Year	% of total
1990	99.9999999949127
1995	99.9999999950128
2000	99.9999999974625
2005	99.9999999974931
2010	99.9999999975362
2011	99.9999999987721
2012	99.9999999963276
2013	99.9999999938966
2014	56.9363859024134
2015	56.726863958877
2016	0
2017	0