Year	%
1999	99.98515
2000	99.92361
2001	99.95147
2003	99.84374
2005	99.94926
2006	99.90685
2007	99.91093
2008	99.78064
2009	99.7581
2010	99.84619
2011	99.84748
2012	99.93412
2013	99.98999
2014	99.92545
2015	99.63702
2016	99.57036