Year	%
1996	21.37
1999	18.57
2000	12.79
2001	18.46
2002	12.99
2003	12.89
2006	10.58
2007	10.53
2008	10.61
2010	9.07
2011	11.57
2012	10.98
2013	10.99
2015	11.23
2016	10.81
2019	10.55