Thought this might interest some people.
The Flickr Stats app on Flickr takes your archive of Flickr Stats (downloadable till the 1st June for Pro users) and generates some lovely graphs. http://www.flickr.com/services/apps/72157623630152423/
Well here is my graph:
http://flickr.vispillo.org/output/1273826937593.html
And what is one of the most popular search terms for finding my photos? Yes, guinea pigs. Great!