Year	%
1995	43.77
1997	39
1998	42.83
1999	38.89
2000	35.69
2001	31.4
2002	36.87
2003	35.68
2004	33.45
2005	36.81
2006	36.8
2007	31.55
2008	35.7
2009	36.95
2010	35.7
2011	36.91
2012	37.09
2013	33.83
2014	33.82
2015	32.79
2016	32.79
2017	36.58