Close voting by user
There have been 15403 close votes since the site started, and 1416 reopen votes; or about 10 times as many close votes as open votes. Note, this does not count the deleted questions. I measured each voter's close to re-open stance using decibels, so a score of 10 means you close 10 times more than you reopen, 20 means 100 times more, -10 means you reopen 10 times more than you close, etc.
The average for the site is 10.4 decibels. I use a system to account for zeros, so the highest user is 26.8 decibels (48 close votes, no re-opens) while the lowest user is -21.8 decibels (0 close votes, 15 reopens).
Breaking the users down into categories by decibel, 0.37% of all close votes are given by people who's scores are negative (more reopen than close), 22% of close votes are given by users whose scores are positive but below average, while the remaining 78% percent of users have scores above average. 18 % of close votes come from users with a score of 20 or higher; that is, they have cast at least 100 times as many close votes as re-open votes.
User changes in 2017
If you look at data just since 2017, the average score has increased to 11.1 decibels, while the close votes from users with a score of 20 or higher is up to 23% with 84% of votes coming from users who score above 10.
For all time, the weighted score of the top 10 closers is 16.3, while for 2017, the weighted score is 17.8.
Overall question outcome
Edit: More changes to these numbers, I'm learning how to use the database better, sorry
For all time, there are 14166 questions on this site, and 3258 that have been closed but remain, and 2115 that have been deleted; 38% of all questions have been closed.
For 2017, there are 5546 questions posted, and 1522 that have been closed and remain, and 847 that have been deleted; 43 % of questions posted in 2017 have been closed.
Cross Site Comparisons
Questions Closed Reopened Deleted CloseRate ReopenRate DeleteRate
Worldbuilding 14166 5788 415 2115 40.1% 7.2% 36.5%
Role Playing 27205 6990 1539 2663 25.7% 22.0% 38.1%
SciFi & Fant 50628 12044 1282 6442 23.8% 10.6% 53.5%
Workplace 26121 16847 668 9013 64.5% 4.0% 53.5%
Travel 34798 14423 845 7816 41.4% 5.9% 54.2%
IT Security 61690 25488 276 18108 41.3% 1.1% 71.0%
Physics 155167 62415 790 45388 40.2% 1.3% 72.7%
Skeptics 12575 5828 602 4378 46.3% 10.3% 75.1%
Cross Valid 168852 61992 1431 53719 36.7% 2.3% 86.7%
Allow me to draw a conclusion. We have the lowest 'delete' rate, that is, the number of questions that get closed before anyone answers or comments on, so that they get auto-deleted. The only other site that has such a low delete rate (that I found, so far) is Role Playing. Yet that site re-opens nearly 1 in 4 questions that get closed. Note there is a general increasing trend in reopen rate with decreasing delete rate.
We are a close and reopen fast type of site, that neglects to reopen.