Year	%
1995	17.24
1997	17.47
2001	18.93
2002	18.94
2003	24.52
2004	24.52
2005	22.16
2006	24.53
2007	17.43
2008	17.39
2009	17.39
2010	17.39
2011	16.96
2012	18.52
2013	15.97
2015	15.99
2016	15.99
2017	15.99