Year	%
1999	75.67
2000	75.65
2001	75.67
2002	73.82
2003	73.82
2004	73.82
2005	73.8
2006	73.82
2007	73.15
2008	72.98
2009	72.98
2010	72.98
2011	72.98
2012	72.98
2013	72.77
2014	72.77
2015	72.77
2016	72.77
2017	73.09
2018	73.09
2019	73.09
2020	73.09
2021	73.09