Year	%
1996	20.85
1999	18.42
2000	10
2001	9.17
2002	9.34
2003	9.56
2004	8.97
2006	8.53
2007	9.18
2010	9.35
2011	9.68
2012	13.44
2013	12.64
2015	9.98
2016	10.45
2020	9.02
2021	9.13