Year % 1995 56.60521 1998 55.58541 2000 55.54647 2001 54.19513 2002 50.46844 2003 55.5381 2004 55.5381 2005 57.3675 2007 51.08163 2008 51.4007 2009 49.98753 2010 49.94205 2011 49.99657 2012 50.49805 2013 50.59424 2015 48.5807 2016 52.48042 2019 49.56528