Year	%
1993	9.31
1994	11.89
1995	12.54
1996	11.72
1997	11.4
1998	11.88
1999	13.63
2000	11.72
2001	12.06
2002	12.01
2003	11.85
2004	11.65
2005	11.88
2006	9.89
2007	10.13
2008	9.14
2009	8.04
2010	9.16
2011	7.47
2012	7.27
2014	6.97
2015	10.66
2016	11.16
2017	9.64
2018	9.67
2019	9.69
2020	9.05
2021	7.8