Year	% (cumulative)
1970	66.7732009887695
1975	92.3747329711914
1979	93.0972137451172
1980	93.013671875
1981	93.2828903198242
1994	91.3606796264648
1995	96.2784042358398
1996	96.3255844116211
1997	96.4170303344727
1998	96.3749160766602
1999	96.4688873291016
2000	96.4873962402344
2001	96.5578002929688
2002	96.5789337158203
2003	96.6689071655273
2004	94.2598495483398
2005	93.8805084228516
2006	94.4630966186523
2007	96.9673919677734
2008	94.709716796875
2009	94.7121734619141
2010	94.9339828491211
2011	95.0440216064453
2012	95.1430130004883
2013	95.3915863037109
2014	95.4298477172852
2015	95.4783782958984
2016	95.7040634155273
2017	95.0186920166016
2018	96.0759582519531
2019	97.6509704589844
2020	96.5483474731445
2021	95.4242782592773
2022	96.651123046875
2023	97.8671188354492