Year	%
1992	7.98
1995	10.53
1996	10.71
1997	10.67
1998	13.07
1999	12.89
2000	9.27
2001	8.89
2002	11.46
2004	7.12
2005	6.32
2006	5.62
2007	5.79
2008	5.71
2009	5.65
2010	5.89
2011	6.16
2012	6.29
2013	6.38
2014	6.38
2015	6.51
2016	6.8
2017	6.85
2018	6.9
2019	6.91
2020	6.86
2021	6.86