Year	%
1999	75.24
2000	75.23
2001	75.24
2002	73.98
2003	73.98
2004	73.98
2005	73.95
2006	73.98
2007	73.03
2008	72.91
2009	72.91
2010	72.91
2011	72.91
2012	72.91
2013	71.79
2014	71.79
2015	71.79
2016	71.79
2017	72.23
2018	72.23
2019	72.22
2020	72.22
2021	72.22