Year	%
1996	20.55
1999	17.3
2000	8.27
2001	8.3
2002	8.7
2003	8.81
2004	8.7
2006	8.34
2007	8.46
2010	7.69
2011	7.63
2012	10.52
2013	10.32
2015	8.64
2016	9.17
2020	8.14
2021	8.11