Year	% (cumulative)
1970	16.2999992370605
2000	53.7900009155273
2001	55.75
2002	58
2003	58.9300003051758
2004	61.3699989318848
2005	60.4799995422363
2006	61.7700004577637
2007	63.439998626709
2008	62.5699996948242
2009	64.379997253418
2010	65.370002746582
2011	66.629997253418
2012	67
2013	67.5199966430664
2014	69.379997253418
2015	70.129997253418
2016	70.5500030517578
2017	71.5899963378906
2018	71.9199981689453
2019	73.9599990844727
2020	73.3499984741211
2021	74.7699966430664
2022	74.9400024414062