Year	Percent
2000	18.92308
2001	20.09249
2002	21.29293
2003	22.52441
2004	23.78692
2005	25.08046
2006	26.40504
2007	27.76065
2008	29.14729
2009	30.56497
2010	32.01368
2011	33.49343
2012	35.00421
2013	36.54602
2014	38.11886
2015	39.72274
2016	41.35766
2017	43.0236
2018	44.72059
2019	46.4486
2020	48.20765
2021	49.99773
2022	51.81884