Year	% of total
1990	99.9999999998307
1995	99.9999999998527
2000	100
2005	100
2010	100
2011	100
2012	100
2013	100
2014	99.9999999999937
2015	99.9924723264795
2016	99.992479528915
2017	99.9924901861957