I recently updated my Reading and Listening Lists page to include yearly totals. 2013 and 2014 include totals for books read, books listened to on Audible and their combined totals.
Years 2012 and earlier have books read totals.
While working on the totals, I noticed that they have fluxuated greatly over the years. 1995 had the fewest number of books read at 20. 1995 was also the first year that I started keeping the list.
2004 had the most books read at 39.
For 2015 I will try to break 40 for the first time.