Year Percent 2000 59.47162 2001 58.93592 2002 58.40211 2003 57.87019 2004 57.34016 2005 56.81203 2006 56.28579 2007 55.76144 2008 55.23898 2009 54.71841 2010 54.19974 2011 53.68295 2012 53.16806 2013 52.65506 2014 52.14396 2015 51.63474 2016 51.12742 2017 50.62199 2018 50.11845 2019 49.74169 2020 49.74169 2021 49.74169 2022 49.74169