Year	% of total
1990	99.9999999956397
1995	99.9999999959046
2000	100
2005	100
2010	100
2011	100
2012	100
2013	99.9999999992591
2014	99.9942643385562
2015	99.978648421315
2016	93.6940546750848
2017	82.8031823467088