Year	%
1996	18.71
1997	14
1998	14.03
1999	16.45
2000	15
2001	11.22
2002	12.5
2003	12.03
2006	9.12
2007	9.34
2010	11.41
2011	9.95
2012	9.88
2013	10.16
2015	11.82
2016	9.36
2017	9.28
2020	9.97