Stats files maintained by Erik Zachte

Pagecount files repackaged and reformatted, one file per month: link
Note: due to a bug these pagecount files are not complete.
After applying a fix (to be done) all files need to be regenerated.
This can take a while. Sorry for the inconvenience.

Projectcount files repackaged, one file per year: link

Raw data for reports at http://stats.wikimedia.org/: link

Notes about the format of the pagecount files

These are derived from Domas' pagecount files but the format is not identical. Each line contains four fields separated by spaces:

wiki code (subproject.project)
article title
monthly total (with interpolation when data is missing)
hourly counts

In the wiki code, the subproject is the language code (fr, el, ja, etc) and the project is one of b,k,n,q,s,v,z, corresponding to the projects below:

b:wikibooks
k:wiktionary
n:wikinews
q:wikiquote
s:wikisource
v:wikiversity
z:wikipedia

Hourly counts can be deciphered as follows:

Hour:: from 0 to 23, written as 0 = A, 1 = B ... 22 = W, 23 = X
Day:: from 1 to 31, written as 0 = A, 1 = B ... 25 = Y, 26 = Z, 27 = [, 28 = \, 29 = ], 30 = ^, 31 = _

Source for this information is http://lists.wikimedia.org/pipermail/wikitech-l/2011-August/054644.html.