Year	% of total
1990	99.9999999996763
1995	99.9999999997251
2000	99.9999999999561
2005	99.9999999999621
2010	99.9999999999668
2011	99.9999999999676
2012	99.9999999999684
2013	99.9999999999691
2014	99.9999999999256
2015	99.9999999999704
2016	99.9999999999709
2017	99.9999999999715