Year	%
1993	14.89
1994	19
1995	11.35
1996	25.64
1997	15.75
1998	16.57
1999	14.47
2000	11.46
2001	9.76
2002	12.82
2003	10.98
2004	9.12
2005	10.99
2006	10.37
2007	10.53
2008	33.57
2009	9.12
2010	10.45
2011	9.57
2012	9.76
2013	10.33
2014	9.52
2015	10.48
2016	9.51
2017	10.5