Year	%
1997	54.74
2001	55.45
2002	55.45
2003	54.49
2004	54.49
2005	54.49
2006	54.49
2007	53.58
2008	53.58
2009	53.58
2010	53.58
2011	53.58
2013	52.18
2015	53.58
2016	53.58