Year	%
1996	20.78
1997	15.07
1998	15.11
1999	17.4
2000	14.62
2001	12.5
2002	13.02
2003	13.17
2006	10.9
2007	10.59
2010	12.16
2011	9.32
2012	10
2013	9.73
2015	11.66
2016	9.17
2017	8.86
2020	8.66