Year	%
1992	16.7
1995	11.94
1997	13.57
1998	13.36
1999	12.8
2000	13.35
2001	14.66
2002	13.61
2003	12.25
2004	11.93
2005	12.96
2006	11.09
2007	11.3
2008	9.33
2009	8.89
2010	10.22
2011	8.04
2012	8
2013	7.87
2014	10.05
2015	11.78
2016	10.91
2017	10.44
2018	9.67
2019	11.06
2020	15.91
2021	15.37