Year	% of total
1990	99.99999999998808
1995	99.99999999999005
2000	100
2005	100
2010	100
2011	100
2012	100
2013	99.99999999999868
2014	99.99998986967148
2015	99.99996295670361
2016	99.98917854485124
2017	99.97115933229274