Year	% of total
1990	99.9999999996977
1995	99.9999999997361
2000	99.9999999998025
2005	99.9999999998325
2010	99.9999999998562
2011	99.9999999998604
2012	99.9999999998646
2013	99.9999999998685
2014	99.9999999998723
2015	99.999999999876
2016	99.9999999998795
2017	99.9999999998829