Year % 1996 63.13186 1999 57.18353 2000 55.22529 2001 50.33163 2002 50.12267 2003 51.27833 2004 54.80217 2005 54.80217 2006 43.47317 2007 50.76315 2008 53.71863 2009 57.90964 2010 64.53511 2011 64.53511 2012 52.33681 2013 59.69048 2014 56.15298 2015 54.4589 2016 55.9761 2017 55.70977 2018 50.46763 2019 50.60734 2020 50.60734 2021 50.60734