Year	%
1992	16.36
1995	11.49
1997	13.4
1998	13.69
1999	13.02
2000	13.37
2001	14.46
2002	13.7
2003	12.75
2004	11.87
2005	12.77
2006	10.61
2007	11.1
2008	9.62
2009	9.09
2010	9.96
2011	8.59
2012	8.59
2013	8.42
2014	9.67
2015	10.67
2016	10.04
2017	10.99
2018	8.87
2019	10.19
2020	14.06
2021	13.61