Year	% of total
1990	100
1995	99.9842109816904
2000	99.957431968077
2005	100
2010	99.9566358235583
2011	100
2012	99.955997318409
2013	97.6859593235148
2014	16.5989802462163
2015	90.8480627384849
2016	17.4195577199093
2017	17.8244594869492