Year	%
1992	14.81
1993	13.87
1995	13.09
1996	14.92
1997	14.93
1998	17.15
1999	15.59
2000	15.61
2001	13.47
2002	15.15
2003	15.22
2004	12.14
2005	10.87
2006	10.94
2007	11.87
2008	11.54
2009	12.09
2010	11.86
2011	11.73
2012	11.53
2013	12.62
2014	13.05
2015	12.93
2016	13.05
2017	13.18
2018	12.91
2019	12.6
2020	12.59
2021	12.31