Year	%
1992	14.53
1995	12.07
1997	12.65
1998	15.19
1999	14
2000	13.5
2001	13.63
2002	14.08
2003	14.44
2004	14.22
2005	14.02
2006	14.26
2007	18.74
2008	20.16
2009	18.33
2010	14.18
2011	20.99
2012	20.99
2013	20.99
2014	17.21
2015	17.21
2016	16.19
2017	19.63
2018	22.79
2019	20.25
2020	22.59
2021	22.32