Continuing my sometimes-annual practice of posting these numbers, here is the information on how many questions were closed on various sites around the network in 2018:
Site Asked AskedAndClosed PctAskedAndClosed AllClosed DuplicatesClosed DuplicatesReopened OTClosed OTReopened UnclearClosed UnclearReopened TooBroadClosed TooBroadReopened OpinionBasedClosed OpinionBasedReopened
------------------------------------ --------- -------------- ----------------- --------- ---------------- ------------------ -------- ---------- ------------- --------------- -------------- ---------------- ------------------ --------------------
Stack Overflow 2,888,870 331,039 11.46 % 353,949 143,339 5,865 89,254 1,375 43,185 1,089 65,420 846 12,751 104
Super User 53,131 11,036 20.77 % 11,680 1,502 61 4,852 140 2,080 116 2,796 112 450 11
Server Fault 28,918 6,096 21.08 % 6,351 649 17 4,567 96 638 37 400 11 97 4
Stack Apps 282 75 26.60 % 91 16 0 72 4 3 0 0 0 0 0
Seasoned Advice 2,725 604 22.17 % 630 303 6 141 4 83 4 49 3 54 4
Home Improvement 8,804 1,107 12.57 % 1,177 111 2 657 7 232 2 110 1 67 0
Game Development 6,412 887 13.83 % 985 153 8 483 26 72 9 185 11 92 3
Arqade 7,133 1,807 25.33 % 1,967 610 7 722 20 370 8 164 7 101 3
GIS 21,525 5,158 23.96 % 6,098 1,041 66 1,917 148 1,452 195 1,491 228 197 12
Mathematics 216,187 35,774 16.55 % 38,368 7,044 190 25,403 651 4,966 139 663 24 292 8
Photography 2,664 784 29.43 % 862 330 14 292 8 147 5 50 0 43 1
Cross Validated 38,040 9,414 24.75 % 11,095 1,634 49 4,844 193 3,699 442 850 51 68 4
Web Applications 5,067 1,395 27.53 % 1,510 261 2 819 4 293 1 103 1 34 0
Webmasters 4,392 1,868 42.53 % 1,938 478 21 746 41 329 62 269 28 116 13
Ask Different 16,000 2,505 15.66 % 2,668 957 46 705 49 657 115 225 36 124 8
Theoretical Computer Science 1,400 299 21.36 % 303 6 0 262 6 29 0 5 0 1 0
English Language & Usage 22,415 10,431 46.54 % 10,761 1,658 38 6,728 158 1,279 49 281 4 815 29
Money 5,011 1,171 23.37 % 1,297 189 3 625 19 219 3 131 1 133 1
RPG 7,504 2,278 30.36 % 2,442 577 135 313 48 708 361 388 134 456 119
TeX - LaTeX 26,890 4,341 16.14 % 5,348 2,176 101 1,209 19 1,665 32 229 6 69 1
Ask Ubuntu 62,399 13,902 22.28 % 15,321 7,758 148 4,166 92 2,579 127 493 16 325 5
Unix & Linux 33,828 7,819 23.11 % 8,192 2,386 106 1,634 34 2,530 109 1,256 38 386 10
WordPress Development 18,535 4,391 23.69 % 4,524 169 1 3,679 23 241 4 366 4 69 1
Bicycles 1,917 248 12.94 % 266 86 0 108 3 41 0 13 0 18 1
Software Engineering 8,896 2,668 29.99 % 2,728 165 3 1,618 10 285 2 444 7 216 3
Android Enthusiasts 8,138 1,917 23.56 % 1,973 324 6 1,290 29 294 23 35 0 30 2
Board & Card Games 1,408 276 19.60 % 314 144 8 44 4 44 12 47 5 35 8
Physics 35,231 11,800 33.49 % 12,298 2,618 33 6,465 63 2,390 55 551 34 274 9
Homebrewing 448 12 2.68 % 12 4 0 6 0 1 0 1 0 0 0
Information Security 10,916 3,763 34.47 % 3,867 696 6 1,939 25 494 14 604 7 134 2
Writing 1,818 527 28.99 % 549 79 7 353 18 40 8 40 1 37 6
Electrical Engineering 28,360 6,792 23.95 % 6,992 581 8 2,817 50 2,126 48 1,266 13 202 2
Graphic Design 6,850 1,553 22.67 % 1,607 325 9 584 19 305 17 311 12 82 3
DBA 14,822 3,028 20.43 % 3,339 341 19 1,075 21 1,215 65 576 23 132 4
Science Fiction & Fantasy 8,002 1,771 22.13 % 1,966 894 53 434 67 174 33 189 49 275 51
Area 51 Discussions 456 97 21.27 % 100 33 2 61 2 4 1 2 0 0 0
Code Review 13,191 4,589 34.79 % 4,796 29 2 4,453 255 277 34 23 3 14 1
Code Golf 1,830 730 39.89 % 768 148 36 349 30 252 91 19 3 0 0
Quantitative Finance 3,240 553 17.07 % 560 62 0 324 4 82 4 65 1 27 0
Project Management 740 167 22.57 % 179 2 0 71 1 36 0 30 0 40 0
Skeptics 1,172 447 38.14 % 454 27 0 257 13 121 34 10 4 39 11
Drupal Answers 11,970 2,166 18.10 % 2,503 320 12 686 26 653 22 757 16 87 3
Physical Fitness 1,098 319 29.05 % 336 47 1 216 6 21 3 36 1 16 1
Motor Vehicles 4,455 362 8.13 % 377 88 2 143 7 63 3 52 2 31 0
Parenting 716 291 40.64 % 315 26 1 130 7 81 11 39 3 39 5
SharePoint 10,759 667 6.20 % 681 106 8 201 4 246 30 95 12 33 2
Music 3,688 948 25.70 % 1,034 182 5 524 8 102 7 97 4 129 2
Software Quality Assurance & Testing 2,130 377 17.70 % 388 43 2 118 1 131 7 61 1 35 2
Mi Yodeya 4,046 926 22.89 % 978 382 15 340 50 171 46 53 13 32 5
Astronomy 2,290 371 16.20 % 383 113 1 108 8 100 7 28 2 34 1
German Language 1,798 457 25.42 % 468 87 10 269 37 59 6 34 4 19 3
Japanese Language 3,666 756 20.62 % 772 285 11 413 11 44 3 14 1 16 0
Gardening & Landscaping 2,138 109 5.10 % 125 22 0 45 3 29 0 22 2 7 0
Philosophy 3,021 565 18.70 % 572 42 0 267 4 108 2 53 1 102 3
Travel 8,750 3,762 42.99 % 3,856 1,540 27 1,151 53 661 29 229 17 275 7
Cryptography 4,919 1,099 22.34 % 1,133 186 9 735 32 116 19 72 7 24 4
Literature 1,012 135 13.34 % 138 9 0 63 5 24 4 32 2 10 1
Signal Processing 4,543 926 20.38 % 947 100 2 269 4 359 14 202 2 17 0
French Language 1,537 119 7.74 % 120 40 2 56 1 13 2 10 1 1 0
Christianity 1,807 723 40.01 % 769 99 10 314 16 107 3 66 2 183 9
Bitcoin 6,909 1,491 21.58 % 1,589 463 6 468 3 350 5 186 3 122 1
Linguistics 1,517 388 25.58 % 399 20 0 272 4 56 1 35 1 16 0
Biblical Hermeneutics 1,460 303 20.75 % 320 48 0 189 6 48 0 11 0 24 1
Economics 2,891 532 18.40 % 545 24 0 353 0 102 0 43 0 23 0
History 2,467 680 27.56 % 692 37 1 340 17 118 10 120 7 77 4
Bricks 466 38 8.15 % 39 14 0 4 0 10 0 9 2 2 0
Spanish Language 1,068 107 10.02 % 129 51 2 56 6 6 1 12 0 4 0
Computational Science 1,321 273 20.67 % 337 23 0 224 1 73 0 15 0 2 0
Movies & TV 3,851 1,340 34.80 % 5,813 192 4 5,201 22 148 18 96 9 176 14
Chinese Language 1,285 98 7.63 % 103 23 0 64 1 9 1 6 0 1 0
Biology 5,395 1,392 25.80 % 1,470 133 6 737 11 291 5 159 1 150 0
Poker 235 65 27.66 % 68 41 0 9 0 8 1 5 0 5 0
Mathematica 11,084 2,619 23.63 % 2,790 677 21 1,797 45 256 12 51 2 9 0
Psychology & Neuroscience 1,457 568 38.98 % 601 43 2 377 15 67 4 62 4 52 3
The Great Outdoors 867 108 12.46 % 111 25 2 39 10 14 6 27 12 6 0
Martial Arts 213 56 26.29 % 59 14 0 16 2 9 0 8 0 12 0
Sports 965 314 32.54 % 373 51 1 197 4 25 1 60 3 40 4
Academia 6,591 2,371 35.97 % 2,455 435 7 1,559 65 210 12 117 11 134 14
Computer Science 8,554 1,749 20.45 % 1,775 339 11 792 11 478 20 110 6 56 1
The Workplace 5,487 2,839 51.74 % 2,868 513 35 1,344 114 302 26 288 27 421 40
Windows Phone 134 17 12.69 % 18 6 0 6 0 5 0 0 0 1 0
Chemistry 9,981 5,148 51.58 % 5,309 644 11 2,740 60 1,062 26 769 21 94 0
Chess 872 199 22.82 % 203 67 0 39 1 30 1 20 0 47 1
Raspberry Pi 6,563 1,423 21.68 % 1,473 178 12 457 11 511 51 290 13 37 0
Russian Language 789 117 14.83 % 123 21 0 78 16 10 4 12 1 2 0
Islam 3,164 924 29.20 % 1,108 360 1 325 2 246 6 75 1 102 0
Salesforce 20,426 3,184 15.59 % 3,304 583 11 1,218 24 895 17 537 4 71 1
Ask Patents 557 107 19.21 % 107 20 1 73 1 12 0 0 0 2 0
UX 3,083 842 27.31 % 875 69 1 335 6 107 3 150 2 214 1
Genealogy & Family History 512 98 19.14 % 103 34 0 31 1 18 6 13 3 7 1
Robotics 1,107 307 27.73 % 330 19 1 86 4 79 6 40 2 106 3
ExpressionEngine® Answers 453 8 1.77 % 9 0 0 7 0 2 0 0 0 0 0
Politics 2,560 865 33.79 % 894 99 12 425 71 127 20 104 12 139 26
Video Production 1,309 103 7.87 % 110 15 0 58 2 14 0 18 0 5 0
Anime & Manga 2,121 645 30.41 % 656 101 4 395 9 52 10 36 8 72 2
Magento 23,229 1,557 6.70 % 1,823 405 6 601 11 412 18 290 10 115 3
English Language Learners 14,573 2,394 16.43 % 2,442 372 5 1,668 144 162 12 141 4 99 7
Sustainable Living 235 28 11.91 % 32 7 0 14 0 4 0 4 0 3 0
Tridion 600 4 0.67 % 4 2 0 2 0 0 0 0 0 0 0
Reverse Engineering 1,666 340 20.41 % 350 44 2 140 5 82 7 74 1 10 0
Arduino 5,458 1,925 35.27 % 1,999 144 2 578 10 781 26 477 3 19 0
Network Engineering 4,810 2,676 55.63 % 2,921 111 2 2,156 31 74 6 516 27 64 2
Open Data 800 45 5.63 % 49 19 1 19 1 10 0 1 0 0 0
Freelancing 236 53 22.46 % 53 1 0 21 0 3 0 24 1 4 0
Blender 15,253 2,258 14.80 % 2,340 1,171 16 442 3 477 16 171 4 79 3
MathOverflow 16,305 3,080 18.89 % 3,112 86 1 2,595 35 355 11 52 4 24 4
Space Exploration 3,124 497 15.91 % 507 154 10 147 11 85 20 60 9 61 13
Sound Design 787 204 25.92 % 218 13 0 153 5 22 1 12 1 18 0
Tor 1,034 100 9.67 % 114 37 0 25 0 30 0 19 0 3 0
Pets 1,161 293 25.24 % 334 239 9 39 3 37 3 12 0 7 0
Amateur Radio 699 101 14.45 % 104 10 1 47 11 28 9 12 4 7 4
Italian Language 542 26 4.80 % 28 10 0 12 1 4 1 2 0 0 0
Stack Overflow em Português 45,406 9,679 21.32 % 9,964 1,904 75 3,281 119 3,427 112 1,151 16 201 2
Aviation 3,958 1,081 27.31 % 1,098 364 13 236 14 217 24 176 26 105 15
Ebooks 231 20 8.66 % 20 0 0 17 0 2 1 0 0 1 0
Beer, Wine & Spirits 151 22 14.57 % 25 3 0 10 1 4 0 3 0 5 0
Software Recommendations 3,512 421 11.99 % 430 8 0 287 17 87 21 38 2 10 1
CS50 1,449 36 2.48 % 40 5 0 16 0 12 0 5 0 2 0
Expatriates 1,332 141 10.59 % 146 40 0 35 0 25 0 28 0 18 0
Mathematics Educators 466 116 24.89 % 119 2 0 82 1 18 0 9 0 8 0
Earth Science 1,358 281 20.69 % 294 29 1 96 6 145 5 22 0 2 0
Joomla 817 80 9.79 % 96 12 0 37 2 20 2 24 1 3 0
Data Science 8,799 1,448 16.46 % 1,484 28 0 480 2 343 8 523 2 110 1
Puzzling 5,204 740 14.22 % 747 168 4 322 21 80 6 164 15 13 0
Craft CMS 2,322 92 3.96 % 93 27 1 59 0 3 0 3 0 1 0
Buddhism 1,193 127 10.65 % 131 53 4 32 0 21 3 10 5 15 5
Hinduism 3,021 744 24.63 % 824 433 25 162 21 54 8 61 12 114 18
Community Building 54 13 24.07 % 13 0 0 8 1 2 0 3 0 0 0
Worldbuilding 6,161 2,483 40.30 % 2,511 287 27 643 58 295 36 669 72 617 54
スタック・オーバーフロー 5,261 246 4.68 % 250 22 1 109 23 78 4 30 2 11 2
Emacs 3,444 110 3.19 % 118 70 0 17 2 17 2 8 0 6 0
History of Science and Mathematics 537 48 8.94 % 48 12 0 23 0 6 0 2 0 5 0
Lifehacks 517 162 31.33 % 164 14 0 143 4 4 0 1 0 2 0
Engineering 2,830 557 19.68 % 579 23 0 173 6 235 9 132 4 16 0
Coffee 216 15 6.94 % 16 4 0 3 0 1 0 3 0 5 0
Vi and Vim 1,789 151 8.44 % 165 92 7 39 3 14 4 11 1 9 0
Music Fans 717 75 10.46 % 90 7 1 48 0 11 0 12 0 12 0
Woodworking 513 27 5.26 % 29 5 0 14 1 4 1 5 0 1 0
CiviCRM 2,161 15 0.69 % 18 14 0 2 0 2 0 0 0 0 0
Medical Sciences 2,121 998 47.05 % 1,174 29 2 900 22 77 2 92 0 76 3
Stack Overflow на русском 87,030 9,214 10.59 % 9,583 2,106 71 3,409 139 2,160 75 1,014 19 894 10
Русский язык 2,541 194 7.63 % 213 42 1 127 10 21 4 11 0 12 2
Mythology & Folklore 420 35 8.33 % 38 6 0 14 0 7 1 9 0 2 0
Law 4,549 776 17.06 % 782 124 6 389 14 143 13 104 8 22 0
Open Source 660 107 16.21 % 108 36 0 51 1 11 0 6 0 4 0
elementary OS 1,741 68 3.91 % 97 56 0 25 0 12 0 1 0 3 0
Portuguese Language 248 22 8.87 % 23 6 0 14 3 0 0 3 0 0 0
Computer Graphics 765 77 10.07 % 79 3 0 45 0 20 1 5 0 6 0
Hardware Recommendations 1,108 471 42.51 % 483 1 0 406 11 18 1 39 1 19 1
Stack Overflow en español 50,399 7,926 15.73 % 8,258 719 21 2,380 108 1,975 72 1,842 43 1,342 42
3D Printing 899 97 10.79 % 103 14 1 35 2 24 1 17 1 13 0
Ethereum 14,163 1,937 13.68 % 2,005 747 4 576 6 312 5 291 5 79 0
Latin Language 776 19 2.45 % 19 9 2 7 2 3 1 0 0 0 0
Language Learning 316 96 30.38 % 96 7 1 61 6 6 0 17 4 5 1
Retrocomputing 850 88 10.35 % 91 12 3 41 3 8 2 19 7 11 2
Arts & Crafts 385 78 20.26 % 78 7 0 49 2 7 0 11 0 4 0
Korean Language 285 9 3.16 % 10 2 1 4 1 1 0 3 1 0 0
Monero 1,263 207 16.39 % 215 168 1 17 0 13 1 13 0 4 0
Artificial Intelligence 2,059 176 8.55 % 179 11 1 112 5 25 3 27 1 4 0
Esperanto Language 153 7 4.58 % 8 2 0 3 0 2 1 0 0 1 0
Sitecore 3,087 481 15.58 % 500 129 4 220 25 40 2 98 6 13 0
Internet of Things 612 165 26.96 % 173 4 0 73 3 44 6 46 3 6 0
Veganism & Vegetarianism 153 24 15.69 % 25 4 0 10 1 2 1 6 1 3 0
Ukrainian Language 1,091 102 9.35 % 102 44 4 10 0 23 4 14 1 11 2
DevOps 1,377 122 8.86 % 129 11 0 42 0 45 2 20 0 11 0
Bioinformatics 1,104 53 4.80 % 57 3 0 26 1 10 1 15 2 3 0
Computer Science Educators 262 79 30.15 % 79 0 0 67 5 5 0 5 0 2 1
Interpersonal Skills 2,599 1,333 51.29 % 1,414 70 7 620 82 223 40 248 45 253 33
Augur 147 30 20.41 % 30 0 0 10 0 6 1 7 0 7 0
Notes:
- this counts questions asked in 2018 and questions closed in 2018 - the AskedAndClosed and PctAskedAndClosed columns reflect questions that were both asked and closed in 2018, while the remaining columns total up all questions closed in 2018 - even those asked in prior years.
- reopen numbers also include questions asked in years prior - but limit themselves to questions that were closed in 2018 and then also reopened in 2018.
- if a question was closed twice, it'll be counted twice
- if a question was reopened twice, it'll be counted twice
