Year	%
1992	13.73
1993	13.58
1995	12.16
1996	14.42
1997	14.92
1998	16.49
1999	15.42
2000	15.31
2001	14.29
2002	13.12
2003	14.05
2004	13.18
2005	12.83
2006	13.02
2007	13.5
2008	11.79
2009	13.49
2010	14.09
2011	14.3
2012	14.14
2013	13.27
2014	13.84
2015	13.25
2016	13.74
2017	16.58
2018	13.87
2019	12.66
2020	12.16
2021	11.46