Year	%
1993	97.60143
1998	100
1999	99.55084
2001	100
2005	99.70978
2006	99.96664
2007	99.61852
2008	99.59563
2009	99.70525
2010	99.81045
2011	99.73991
2012	99.62291
2013	99.90142
2014	88.50184
2015	98.75764
2016	99.62414
2017	99.65664