Year	Percent
1992	51.39599
1993	51.00275
1994	50.96343
1995	50.60952
1996	50.72749
1997	50.45222
1998	50.76681
1999	50.4129
2000	48.56469
2001	48.83995
2002	52.45773
2003	51.16005
2004	49.62643
2005	48.28942
2006	48.13213
2007	42.64764
2008	42.13238
2009	40.16653
2010	44.36955
2011	44.3299
2012	50.23791
2013	49.96035
2014	50
2015	50.03965
2016	50.1586
2017	50.19826
2018	50.11895
2019	50.1586
2020	50.03965
2021	49.96035