After a long outage (partly caused by unexpected server migration) I revived Wikistats scripts and parsed dumps in the last 10 days. So I can partially answer the question.

Yet the section on volunteers is not in Wikistats, @Aklapper would you be to able to answer that part? (I should have asked your earlier, my apologies)

Last years Quim gave the following (referring to you for this year):

"Volunteers also contribute in several ways to the Foundation’s wiki software: volunteer software developers add new functionality to the code base, and volunteer language specialists add to the code base by translating the wiki interface into different languages. As of mid August 2016, the Foundation had approximately 452 thousand commits merged, through the efforts of approximately 2000 contributors, from which 29 thousand commits were accepted in the past 365 days, through the efforts of approximately 490 active contributors."

Thanks already
Erik

As for data that Wikistats can supply: (1/2)

For the year ended June 30, 2017, volunteers added approximately 7.5 million images, movies, and sound files to the Foundation’s multimedia repository, making the total 40.6 million files.

As for data that Wikistats can supply: (2/2)

"For the year ended June 30, 2017, the educational content of the Foundation’s largest project, Wikipedia, grew by approximately 4.8 million articles to approximately 45.4 million articles total.

Yet the section on volunteers is not in Wikistats, @Aklapper would you be to able to answer that part? (I should have asked your earlier, my apologies)

Note: New system (based on Kibana and ElasticSearch) since February 2017 and hence different algorithms in the background.

Trying to exclude repositories we just fork and import from upstream FOSS projects via an explicit filter in the Advanced Search field, and trying to exclude automated changes by bots such as L10n-bot or Jenkins-mwext-sync, wikimedia.biterg.io states

• between 20160701 and 20170630 for Git: 41742 merged code changes (Git commits) in Wikimedia Git code repositories by 403 different authors / contributors
• all time for Git: 336182 merged code changes (Git commits) in Wikimedia Git code repositories by 1966 different authors / contributors
  • For comparison to previous audit editions: If I also include FOSS projects that we import + use but not develop here, I end up with 422835 and 4140

(The numbers for Gerrit (not: Git) are higher due to L10n-bot activity and various other factors it seems. See T175003.)

Note that anyone could gather and play with this data. See https://www.mediawiki.org/wiki/Community_metrics#wikimedia.biterg.io for more info.