Year	%
1992	16.7
1995	13.42
1997	13.57
1998	13.36
1999	12.8
2000	13.35
2001	14.66
2002	13.61
2003	12.25
2004	13.03
2005	13.53
2006	14.17
2007	15.07
2008	13.65
2009	12.21
2010	11.48
2011	10.61
2012	10.61
2013	10.6
2014	12.37
2015	13.22
2016	12.73
2017	12.28
2018	11.66
2019	13.41
2020	16.41
2021	16.89