Year	Percent
2000	57.07291
2001	58.05937
2002	59.04451
2003	60.0286
2004	61.01162
2005	61.99456
2006	62.98701
2007	63.97781
2008	64.96746
2009	65.95548
2010	66.9421
2011	67.92733
2012	68.91116
2013	69.8936
2014	70.87444
2015	71.85388
2016	72.83194
2017	72.87482
2018	72.92057
2019	72.9694
2020	73.0211