Year	%
1995	40.76
1996	40.76
1997	40.76
1998	40.98
1999	40.98
2000	40.98
2001	40.98
2002	41.06
2003	41.06
2004	41.06
2005	41.06
2006	41.06
2007	41.09
2008	41.09
2009	41.09
2010	41.09
2011	41.09
2012	41.53
2013	41.53
2014	41.53
2015	41.53
2017	41.47
2018	41.47
2019	41.47
2020	41.47
2021	41.47