Year	% of total
1990	99.9999999988902
1995	99.9999999989733
2000	99.9852249441559
2005	99.9974022483598
2010	99.9975743742478
2011	99.9999999999521
2012	99.8504036795107
2013	98.2467904153879
2014	78.0374727893922
2015	78.9979626149846
2016	40.0316917397642
2017	40.3790258884236