Year	%
1992	8.06
1993	6.31
1995	9.07
1996	10.08
1997	9.99
1998	12.85
1999	11.41
2000	11.63
2001	10.95
2002	11.35
2003	10.02
2004	9.03
2005	8.08
2006	7.56
2007	7.89
2008	7.49
2009	7.53
2010	7.33
2011	7.3
2012	7.24
2013	7.12
2014	7.46
2015	7.52
2016	7.5
2017	7.73
2018	7.63
2019	7.58
2020	7.91
2021	7.57