Current as of mid-2014: http://cosmicdiary.org/fmarchis/2014/05/19/54_years_of_exploration/ (http://cosmicdiary.org/fmarchis/2014/05/19/54_years_of_exploration/)
Cool! Thanks!
It's a few years out of date (2012), but still great.
I was surprised that we had more missions (40) to Venus than to Mars (38)