Year	% (cumulative)
1973	17.3835601806641
2001	36.7626419067383
2002	37.2000007629395
2003	38.2000007629395
2004	38.560001373291
2005	39.7700004577637
2006	39.5800018310547
2007	41.5800018310547
2008	41.8699989318848
2009	42.4099998474121
2010	40.7900009155273
2011	42.3499984741211
2012	43.060001373291
2013	45.0499992370605
2014	46.0200004577637
2015	43.4199981689453
2016	43.4000015258789
2017	44.7200012207031
2018	44.7700004577637
2019	46.6800003051758
2020	45.9700012207031
2021	48.0800018310547
2022	48.7799987792969