Year	%
1970	33.97587
1998	98.00418
1999	99.96619
2000	100
2001	99.56317
2002	98.97367
2003	100
2004	100
2005	100
2006	100
2007	100
2008	100
2009	100
2010	100
2011	100
2012	100
2013	100
2014	100
2015	100
2016	99.69746