Year	%
1999	99.99077
2000	99.94266
2001	99.89165
2002	99.82053
2003	99.85238
2004	99.84616
2005	99.73215
2006	99.76846
2007	99.61106
2008	99.68269
2009	99.90516
2010	99.88774
2011	99.91113
2012	99.83743
2013	99.89548
2014	99.87645
2015	99.84501
2016	99.91574