Year	Percent
1992	75.22397
1993	75.43677
1994	75.43677
1995	75.54317
1996	75.54317
1997	75.54317
1998	75.54317
1999	75.62829
2000	75.54317
2001	75.54317
2002	75.22397
2003	74.88349
2004	74.58558
2005	74.22382
2006	73.84078
2007	73.52159
2008	73.09599
2009	72.78744
2010	72.3512
2011	72.00647
2012	72.00647
2013	72.00647
2014	72.00647
2015	72.00647
2016	72.00647
2017	72.00647
2018	72.00647
2019	72.00647
2020	72.00647
2021	72.00647