Year	Percent
2000	20.435
2001	20.62504
2002	20.819
2003	21.01688
2004	21.21868
2005	22.13309
2006	23.05825
2007	23.99434
2008	24.94208
2009	25.90062
2010	26.87067
2011	27.8486
2012	28.83499
2013	29.82933
2014	30.83106
2015	31.84077
2016	32.75394
2017	33.52835
2018	34.22833
2019	34.49241
2020	34.75593
2021	35.01829