Year	% (cumulative)
1975	23.7457294464111
1985	37.2468414306641
1996	42.270378112793
2003	59.2605400085449
2006	47.13330078125
2008	46.0800018310547
2009	48.9700012207031
2010	50.2000007629395
2011	52.7700004577637
2012	52.9599990844727
2013	52.8699989318848
2014	53.939998626709
2015	54.5299987792969
2016	55.4700012207031
2017	56.5299987792969
2018	57.1599998474121
2019	58.0900001525879
2021	61.0200004577637
2022	62.7900009155273