Year	%
1992	17.23
1995	12.92
1997	12.78
1998	12.92
1999	13.27
2000	13.21
2001	13.34
2002	13.59
2003	13.29
2004	12.51
2005	12.7
2006	12.44
2007	11.89
2008	12.29
2009	12.25
2010	13.14
2011	11.85
2012	11.86
2013	11.68
2014	11.04
2015	11.93
2016	11.21
2017	12.02
2018	11.12
2019	11.97
2020	14.61
2021	13.24