Year	%
1998	99.69616
1999	99.87254
2000	99.92314
2001	99.88251
2002	99.74968
2003	99.7957
2004	99.85666
2005	99.67831
2006	99.63624
2007	99.94772
2008	99.76839
2009	99.93123
2010	99.79966
2011	99.71734
2012	99.24731
2013	99.97067
2014	99.93242
2015	99.95767
2016	99.67424