Year	% of total
1990	99.9999984222828
1995	99.9999983352227
2000	99.9999005780569
2005	100
2010	100
2011	100
2012	100
2013	99.9998976351363
2014	99.9799737860652
2015	99.79952467885
2016	99.2874867475319
2017	99.2342288664906