Year	% of total
1990	99.9999999999606
1995	99.9999999999267
2000	100
2005	99.9999999999948
2010	100
2011	100
2012	99.9999999999948
2013	99.9962164768805
2014	99.9815664183042
2015	99.9962149714443
2016	99.9660913066726
2017	99.9661157279646