If you're curious how many full sets you've completed, look in your folding directory. Find the newest file with a name like 'handle_x_handle_y_z.val' where handle is the 8 character handle you were given when you signed up. x will be the number of complete cycles your computer has finished since installing. y and z are generation and structure numbers.
My fastest computer got a fresh install with the latest protein/client update, and has completed 9 full sets. My slowest hasn't had a reinstall since July, and is currently on its 43rd.