Year	Percent
1992	32.07345
1993	32.45927
1994	31.9377
1995	32.73793
1996	32.75936
1997	32.59503
1998	32.48785
1999	32.6379
2000	32.67362
2001	32.67362
2002	32.65933
2003	32.83795
2004	33.22378
2005	33.38097
2006	33.83109
2007	33.78823
2008	33.77394
2009	34.00543
2010	33.97899
2011	33.95827
2012	33.93112
2013	34.1569
2014	34.67353
2015	34.90021
2016	35.12789
2017	35.35629
2018	35.38872
2019	35.43627
2020	35.42042
2021	35.42762