Year	%
1993	8.35
1994	11.72
1995	11.38
1996	11.37
1997	11.03
1998	10.9
1999	11.34
2000	10.07
2001	11.78
2002	10.82
2003	10.49
2004	9.84
2005	9.68
2006	7.21
2007	7.14
2008	6.18
2009	5.19
2010	7.08
2011	5.1
2012	5.18
2014	6.43
2015	7.96
2016	8.39
2017	8.99
2018	9.04
2019	9.05
2020	7.6
2021	5.94