Year Percent 2000 59.01049 2001 57.82858 2002 56.65333 2003 55.48438 2004 54.3217 2005 53.17256 2006 52.03639 2007 50.91299 2008 49.80147 2009 48.70128 2010 47.61218 2011 46.53332 2012 45.46443 2013 44.40493 2014 43.354 2015 42.31135 2016 41.27665 2017 40.24882 2018 39.22755 2019 38.21227 2020 37.2024 2021 36.19738 2022 36.29504