Year	%
1992	16.25
1995	11.67
1997	13.05
1998	13.7
1999	13.58
2000	13.5
2001	13.74
2002	13.84
2003	13.85
2004	12.36
2005	12.22
2006	10.77
2007	11.07
2008	11.7
2009	11.82
2010	12.21
2011	11.57
2012	11.49
2013	11.17
2014	10.94
2015	10.58
2016	11.16
2017	10.8
2018	9.45
2019	11.45
2020	13.36
2021	11.82