Year	Percent
2000	18.19808
2001	18.19808
2002	19.74519
2003	21.2923
2004	22.8394
2005	24.38651
2006	25.93362
2007	27.48186
2008	29.03023
2009	30.57873
2010	32.12735
2011	33.67611
2012	35.22499
2013	36.77399
2014	38.32313
2015	39.87239
2016	41.42178
2017	42.9713
2018	44.52095
2019	46.07072
2020	47.61866
2021	49.1666
2022	50.71454