I just started coming here in late December. It seems to me that questions from a year ago got a lot more votes and comments than new questions are getting, even accounting for the longer period of time the older questions have been out there. Is Mi Yodea less active relative to previous years? If so, I wonder if it is because more of the basic questions have been taken and the newer questions tend to be at a pretty high level.
Since your having joined the site (in December 2012), there have been no question now listed in top 200 votes questions (meaning no question has gotten more than 14 votes). This question appears to be the latest one (15 votes).
Of the top 100 greatest hits, there have been none from 2013 (though it's only February, so that doesn't say anything). There have been 11 greatest hits since August 2012:
Since January 1, 2013, we have had three 10+ votes questions (though there were quite a few in the 7-9 range):
P.S.: Surviving the zombie apocalypse? now ties this year's record. So I guess we can learn that Purim Torah is popular (so what's new?).
This seems to indicate less average activity on the site per user over time. I would guess that we're attracting more and more people for one-view visits via search, but our heavy use by community members has been about the same for the past year, or possibly declining a bit.