Year	% of total
1990	99.99999999741816
1995	99.99999999766601
2000	100
2005	100
2010	100
2011	100
2012	100
2013	99.9999999703824
2014	99.9977801449374
2015	99.99181132989835
2016	97.59621168658241
2017	93.50345218165408