Year % net 2000 91.51015 2001 93.43614 2002 89.53302 2003 90.26752 2004 89.57403 2005 88.05184 2006 86.29403 2007 86.21159 2008 85.92087 2009 85.3611 2010 85.74998 2011 84.15341 2012 84.32673 2013 84.90403 2014 85.29221