Year	% of total
1990	99.9999999940156
1995	99.9999999941061
2000	99.9999999972901
2005	99.999999997339
2010	99.9999999973956
2011	99.9999999974078
2012	99.9999999974203
2013	99.9999999961496
2014	36.2158992061899
2015	36.1302298192169
2016	0
2017	0