Year	%
1996	6.23
1997	9.77
1998	6.23
1999	6.23
2000	13.01
2001	7.11
2002	9.04
2003	8.44
2004	8.87
2005	6.35
2006	8.87
2007	7.93
2008	8.75
2010	4.69
2011	4.71
2012	4.56
2013	4.71
2015	7.11
2016	7.11
2017	8.14
2018	8.14
2020	7.73
2021	7.84