Year	Percent
2000	64.60221
2001	64.594
2002	64.58579
2003	64.57758
2004	64.56937
2005	64.56116
2006	64.55295
2007	64.54474
2008	64.53653
2009	63.38462
2010	62.233
2011	61.08167
2012	59.93063
2013	58.77988
2014	57.62943
2015	56.47926
2016	55.32939
2017	54.1798
2018	54.1729
2019	54.166
2020	54.1591
2021	54.1522
2022	54.1453