Year	%
1993	9.1
1994	12.04
1995	11.81
1996	11.72
1997	11.85
1998	11.96
1999	13.55
2000	11.57
2001	11.62
2002	12.05
2003	11.88
2004	10.98
2005	10.99
2006	9.02
2007	8.71
2008	7.56
2009	7.34
2010	9.02
2011	7.06
2012	7.27
2014	6.53
2015	8.05
2016	8.27
2017	6.42
2018	6.95
2019	11.24
2020	6.86
2021	6.36