Year	Percent
2000	32.79977
2001	33.69726
2002	34.45813
2003	35.21906
2004	35.97978
2005	36.74003
2006	37.61166
2007	38.5628
2008	39.1672
2009	39.74502
2010	40.29627
2011	40.82073
2012	41.31816
2013	41.78765
2014	42.22958
2015	42.64361
2016	43.02758
2017	43.38135
2018	43.70568
2019	44.00101
2020	44.26763
2021	44.50616
2022	45.18205