Year	Percent
2000	56.50623
2001	57.77506
2002	59.05006
2003	60.33123
2004	61.61817
2005	62.91171
2006	64.21142
2007	65.5173
2008	66.82935
2009	68.14758
2010	69.47197
2011	70.80222
2012	72.14546
2013	73.49981
2014	74.8649
2015	76.23949
2016	77.62286
2017	79.01396
2018	80.41159
2019	81.81511
2020	81.85242
2021	81.89408
2022	81.93991