Year	%
1996	21.98
1999	18.98
2000	14.34
2001	14.46
2002	14.54
2003	14.9
2006	12.88
2007	12.33
2008	12.24
2009	14.02
2010	12.16
2011	11.84
2012	11.64
2013	11.64
2014	11.65
2015	11.66
2016	11.68
2017	13.54
2018	13.59
2019	14.3
2020	10.03