Year	%
1996	34.24
1997	34.25
1998	34.25
2000	34.16
2001	34.16
2003	33.44
2006	33.44
2008	32.1
2009	32.1
2010	32.1
2011	32.1
2012	32.1
2013	32.1
2014	34.04
2015	34.04
2016	34.04
2019	33.93
2020	33.93
2021	33.93