Year	Percent
2000	17.99972
2001	19.15246
2002	20.41868
2003	21.69422
2004	22.97917
2005	24.27262
2006	25.84268
2007	27.44807
2008	29.09013
2009	30.7676
2010	32.48285
2011	34.23641
2012	36.02882
2013	37.85968
2014	39.72632
2015	41.62832
2016	43.56515
2017	45.53805
2018	47.54589
2019	49.58939
2020	51.66774
2021	53.78156
2022	55.92989