Year	Percent
2000	38.28735
2001	38.74959
2002	39.21184
2003	39.67409
2004	40.13634
2005	40.71521
2006	41.29674
2007	41.88092
2008	42.46776
2009	43.05725
2010	43.6494
2011	44.2442
2012	44.84166
2013	45.44178
2014	46.04455
2015	46.64998
2016	47.25806
2017	47.8688
2018	48.48219
2019	49.09824
2020	49.71695
2021	50.20044
2022	50.68394