Year	%
1995	40.64
1996	40.64
1997	40.52
1998	40.52
1999	40.52
2000	40.52
2001	40.52
2002	40.52
2003	40.52
2004	40.52
2005	40.52
2006	40.52
2007	40.75
2008	40.75
2009	40.75
2010	40.75
2011	40.75
2012	40.75
2013	40.75
2014	40.75
2015	40.75
2016	40.75
2017	40.8
2018	40.8
2019	40.8
2020	40.8
2021	40.8