Year	%
1996	7.82
1997	14.55
1998	7.82
1999	7.82
2000	18.06
2001	7.93
2002	7.97
2003	7.97
2004	7.94
2005	7.91
2006	7.92
2007	6.21
2008	7.84
2010	6.22
2011	6.18
2012	6.15
2013	6.14
2015	6.14
2016	6.14
2017	6.15
2018	6.15
2020	6.15
2021	6.15