Year	%
1996	9.63
1997	9.75
1998	9.79
1999	10.15
2000	9.23
2001	9.09
2002	9.15
2003	8.29
2004	8.48
2005	8.96
2006	8.71
2008	8.89
2009	8.19
2011	9.42
2012	8.89
2013	8.83
2014	8.44
2015	7.43
2016	7.68
2017	7.83
2018	8.51
2019	8.12
2020	7.36
2021	7.57