Year	% (cumulative)
1970	5.68445014953613
1976	4.30000019073486
1980	4.97579002380371
2001	25.2600002288818
2002	26.7800006866455
2003	28.0900001525879
2004	29.2700004577637
2005	30.4500007629395
2006	32.310001373291
2007	33.6199989318848
2008	35.4099998474121
2009	37.0200004577637
2010	35.922679901123
2011	39.3499984741211
2012	40.6100006103516
2013	41.7999992370605
2014	42.5200004577637
2015	43.7299995422363
2016	46.9900016784668
2017	47.5400009155273
2018	49.2000007629395
2019	50.2400016784668
2020	52.8899993896484
2021	53.5400009155273
2022	54.0099983215332