Using PFR

they give a career score for players in each draft

year = starting years, as per PFR
2000 = 95
2001 = 196
2002 = 63
2003 = 153
2004 = 116
2005 = 209
2006 = 37
2007 = 54
2008 = 116
2009 = 100
2010 = 100
2011 = 62
2012 = 108 and counting
2013 = 69 and counting
2014 = 66 and counting
2015 = 20 and counting
2016 = 1 and counting