Year	%
1997	55.45
1998	55.45
2000	55.45
2003	55.45
2005	54.49
2006	54.49
2007	54.49
2008	53.58
2009	53.58
2010	53.58
2011	53.58
2012	52.18
2013	52.18
2014	52.18
2015	52.18
2016	52.18
2018	52.9
2019	52.86
2020	52.86
2021	52.86