Year	% (cumulative)
1970	6.24202013015747
1981	12.8337497711182
1986	15.6999998092651
2004	37.2616500854492
2005	40.3894195556641
2006	41.4418296813965
2007	42.3230590820312
2008	42.8323707580566
2009	43.3348388671875
2010	44.2518196105957
2011	45.265308380127
2012	45.6011505126953
2013	46.8258819580078
2014	47.2372512817383
2015	47.8630485534668
2016	48.6490592956543
2017	49.8653259277344
2018	50.4169883728027
2019	52.1955718994141
2020	53.2567481994629
2021	54.9879417419434
2022	55.3492813110352