Year	%
1996	8.85
1997	13.79
1998	8.85
1999	8.85
2000	17.56
2001	8.69
2002	9.24
2003	9.04
2004	8.93
2005	9.48
2006	8.86
2007	8
2008	8.91
2010	7.76
2011	7.29
2012	7.28
2013	7.54
2015	7.9
2016	7.9
2017	8.36
2018	8.36
2020	8.04
2021	7.99