Year	%
1996	10.84
1997	10.85
1998	11.05
1999	11.5
2000	10.54
2001	10.32
2002	10.39
2003	9.31
2004	9.63
2005	10.03
2006	9.61
2008	9.77
2009	9.06
2011	10.2
2012	9.82
2013	9.67
2014	9.45
2015	8.19
2016	8.34
2017	8.59
2018	9.3
2019	8.84
2020	7.94
2021	8.19