Year	%
1999	74.32
2000	74.32
2001	74.32
2002	72.92
2003	72.92
2004	72.9
2005	72.9
2006	72.9
2007	73.84
2008	73.92
2009	73.94
2011	73.94
2012	74.3
2013	74.3
2014	74.3
2015	75.67
2016	75.67
2017	75.82
2021	75.81