My Flickr all time search stats, since late 2007, click on the image to get more info.
Awhile ago Flickr changed from providing all-time stats to a rolling 28 days. They then made available for download, for a limited time, the historical all-time data. This 'limited time' comes to the an end at 01-Jun-2010, and to be honest I wasn't going to bother downloading almost sixty Excel/CSV files dating back to 2007, because the likelihood was I'd never do anything with them. But then I heard about flickrstats by visp, simply authenticate the app and it gets you files for you, analyses them, and presents them in a lovely graph. Visp has also put together a demo video of it in action.
So if you are a Flickr Pro member, it's well worth using this app before the 01-Jun.