Year % net 1995 40.86395 1998 68.49613 1999 71.07261 2000 64.55151 2001 65.82802 2009 79.78155 2010 80.53411 2011 81.10508 2012 82.18894 2014 85.97104 2015 85.50756 2016 85.51776