Year	% (cumulative)
1970	45.0354995727539
1974	50.6742782592773
1979	60.4416694641113
1986	64.506706237793
1987	66.0167465209961
1988	67.4981307983398
1989	69.0114517211914
1990	70.6001892089844
1991	72.0193481445312
1992	74.1115798950195
1993	75.4382705688477
1994	76.5964965820312
1995	77.9111099243164
2004	87.8130493164062
2005	88.5302200317383
2006	89.1814422607422
2007	89.7975692749023
2008	86.4400634765625
2009	87.0569763183594
2010	87.6372528076172
2011	88.2336120605469
2012	88.8097915649414
2013	89.3650131225586
2014	89.8749618530273
2015	90.3738098144531
2016	90.8429718017578
2017	91.3293533325195
2018	95.8107986450195
2019	92.2247009277344
2020	96.3041610717773
2021	94.2133712768555
2022	94.123908996582