Questions about sizes and other quantities of MathOverflow, e.g., number of questions, GB/day transferred, voting statistics, etc.
This tag is for questions about various statistics related to MathOverflow.
Some basic statistics about can be found here: http://stackexchange.com/sites?view=list#science-questions
Some data about this site can be obtained using Stack Exchange Data Explorer.
Additionally, users with reputation at least 25000 have access to site analytics where they can see some data about number of posts, votes, traffic, traffic sources, etc.