Year	% (cumulative)
1970	31.0971908569336
1974	39.3270416259766
1979	48.3471412658691
1986	51.3200912475586
1987	52.7206611633301
1988	54.1858406066895
1989	55.5101509094238
1990	57.8305015563965
1991	59.128719329834
1992	62.4877510070801
1993	64.757568359375
1994	66.1185913085938
1995	67.4894180297852
2004	79.859001159668
2005	80.7229537963867
2006	81.5055465698242
2007	82.2168273925781
2008	76.5755004882812
2009	77.3468399047852
2010	78.0876617431641
2011	78.864631652832
2012	79.644416809082
2013	72.8446807861328
2014	73.577522277832
2015	74.3231964111328
2016	75.0308380126953
2017	75.7789535522461
2018	83.76123046875
2019	77.1716918945312
2020	84.8328170776367
2021	83.3494262695312
2022	84.6941909790039