Year	% of total
1990	99.9999212893143
1995	99.9999311600534
2000	99.9999999996845
2005	99.9987805741339
2010	99.9988422103789
2011	99.9999999997414
2012	99.9988310108241
2013	99.9987989889104
2014	99.9848500876594
2015	99.9988037721753
2016	99.9143420470343
2017	99.9605053798124