Year	%
1993	18.68
1998	18.12
1999	13.33
2000	13.64
2002	13.9
2003	14.01
2004	14.07
2005	14.09
2006	12.5
2007	12.57
2008	14.09
2009	12.3
2010	12.22
2011	12.17
2012	12.05
2013	12.19
2014	12.23
2015	12.23
2016	11.97
2018	12.12
2019	13.55
2020	12.19
2021	12.25