Year	%
2000	18.92
2001	12.32
2002	12.66
2003	11.44
2004	11.23
2005	12.04
2006	9.38
2007	9.21
2008	8.5
2009	8.67
2010	8.46
2011	8.06
2012	8.1
2013	8.08
2014	8.7
2015	8.65
2016	9.22
2017	9.39
2020	8.86