Year	%
1992	96.89272
1993	99.83807
1996	99.471
1997	99.47071
1998	99.965
2000	99.48793
2001	99.69184
2002	99.70759
2003	99.69411
2004	99.96172
2005	99.49205
2006	99.3411
2007	99.38949
2008	99.38879
2009	99.40186
2010	99.28592
2011	99.25003
2012	99.24747
2013	99.19979
2014	99.07942
2016	99.10713