Year	%
1993	9.34
1995	9.44
1996	10.5
1997	9.85
1998	10.15
1999	11.34
2000	10.39
2001	10.14
2002	10.18
2003	9.92
2004	9.66
2005	9.57
2006	9.61
2007	10
2008	9.69
2009	9.5
2010	9.9
2011	9.61
2013	10.79
2015	11.43
2016	10.82
2017	10.87
2018	10.64
2019	11.24
2020	10.69
2021	10.78