Year	% of total
1990	99.9999999997679
1995	99.9999999997069
2000	100
2005	100
2010	100
2011	100
2012	99.9999999999499
2013	99.9920369789871
2014	99.9028728382935
2015	99.9269958828391
2016	98.9068466969409
2017	98.9402145057529