Year	%
1995	15.48
1997	20.88
2001	22.51
2002	19.76
2003	29.88
2004	29.88
2005	29.24
2006	29.89
2007	22.63
2008	22.63
2009	22.63
2010	22.63
2011	22.91
2012	21.91
2013	20.89
2015	20.22
2016	20.22
2017	20.22