Year	Percent
2000	13.01621
2001	13.35448
2002	13.6935
2003	14.03329
2004	14.37384
2005	14.71515
2006	15.05722
2007	15.40004
2008	15.74363
2009	16.08798
2010	16.43308
2011	16.77895
2012	17.12557
2013	17.47296
2014	17.8211
2015	18.17001
2016	18.51967
2017	18.87009
2018	19.22128
2019	19.55068
2020	19.55068
2021	19.55068
2022	19.55068