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	44.27
2004	56.22
2005	52.43
2006	53.36
2007	48.14
2008	51.64
2009	51.57
2010	52.02
2011	52.1
2012	55.44
2013	52.03
2014	53.51
2015	54.66
2016	52.19
2017	9.31