Year	%
1996	49.52
1997	49.52
1998	49.98
1999	49.52
2000	49.52
2001	49.52
2002	48.58
2003	48.58
2004	48.58
2005	48.58
2006	48.58
2007	47.88
2008	47.88
2009	47.88
2010	47.88
2011	47.88
2012	49.86
2013	49.86
2014	49.86
2015	49.86
2016	49.86
2017	49.8
2018	49.8
2019	49.79
2020	49.79
2021	49.79