Year Percent 2000 1.38981 2001 1.73726 2002 2.08471 2003 2.43216 2004 2.77961 2005 3.12706 2006 3.47452 2007 3.82197 2008 4.16942 2009 4.51687 2010 4.86432 2011 5.21177 2012 5.55923 2013 5.55923 2014 5.55923 2015 5.55923 2016 5.55923