Year	% (cumulative)
1974	13.2871904373169
2001	46.0400009155273
2004	44.0499992370605
2005	44.7200012207031
2006	46.8193550109863
2007	45.164981842041
2008	49.6014556884766
2009	49.1699981689453
2010	50.0400009155273
2011	51.560001373291
2012	52.7200012207031
2013	53.5900001525879
2014	58.0099983215332
2015	57.4599990844727
2016	60.1500015258789
2017	56.7360801696777
2018	58.4900016784668
2019	61.5200004577637