Year	%
1995	42.16
1996	35.93
1997	30.69
1998	36.76
1999	34.01
2000	39.15
2001	50.75
2002	50.59
2003	42.13
2004	56.22
2005	52.43
2006	51.86
2007	46.41
2008	50.26
2009	50.18
2010	50.73
2011	52.1
2012	55.44
2013	52.03
2014	51.79
2015	54.66
2016	52.19
2017	9.31