Year	% (cumulative)
1970	12.7918395996094
1976	10.8287601470947
1980	12.3602304458618
2001	37.1699981689453
2002	38.5499992370605
2003	40.0200004577637
2004	41.25
2005	42.2200012207031
2006	44.1699981689453
2007	46.3400001525879
2008	48.25
2009	49.1100006103516
2010	49.0857086181641
2011	52.3400001525879
2012	53.2200012207031
2013	54.2400016784668
2014	54.6599998474121
2015	55.9500007629395
2016	58.6699981689453
2017	59.1500015258789
2018	60.2900009155273
2019	61.3699989318848
2020	63.5999984741211
2021	64.9700012207031
2022	65.0199966430664