Year	%
1995	29.94
1996	34.44
1997	29.8
1998	29.58
1999	34.94
2000	34.55
2001	33.83
2002	35.02
2003	35.27
2004	30.83
2005	31.02
2006	35.17
2007	32.85
2008	32.33
2009	31.16
2010	34.44
2011	33.75
2012	32.79
2013	33.13
2014	30.19
2015	30.68
2016	31.12
2017	35.5