Year	% of total
1990	99.9999955347919
1995	99.9999953081902
2000	99.9996630664952
2005	100
2010	99.9999848884831
2011	100
2012	100
2013	99.998256793497
2014	99.9982696517873
2015	99.9670587427334
2016	99.5536359013624
2017	99.5946490159069