Year	% of total
1990	99.9999999928718
1995	99.9999999933024
2000	99.9999999971141
2005	99.9999999973078
2010	99.9999999975348
2011	99.9999999980561
2012	99.9999999971214
2013	76.6508401699196
2014	0
2015	0
2016	0
2017	0