Year	Percent
2000	37.48629
2001	38.23239
2002	38.90706
2003	39.56158
2004	40.1953
2005	40.80763
2006	41.39977
2007	41.97112
2008	42.52108
2009	43.05083
2010	43.55975
2011	44.04733
2012	44.51464
2013	44.96113
2014	45.39465
2015	45.81593
2016	46.22362
2017	46.61848
2018	46.99924
2019	47.36668
2020	47.72058
2021	48.06025
2022	48.89607