Year	% (cumulative)
1970	64.4604187011719
1975	91.1311798095703
1979	92.304069519043
1980	92.3500823974609
1981	92.670051574707
1994	90.9798889160156
1995	95.9286117553711
1996	96.0971374511719
1997	96.1301803588867
1998	96.2371063232422
1999	96.4165802001953
2000	96.3339385986328
2001	96.3410263061523
2002	96.3021697998047
2003	96.2879257202148
2004	93.8006896972656
2005	93.4958801269531
2006	93.8988571166992
2007	96.5846710205078
2008	94.243782043457
2009	94.3448104858398
2010	94.5925903320312
2011	94.7511520385742
2012	94.8125
2013	95.0018692016602
2014	95.0836791992188
2015	95.1797866821289
2016	95.456901550293
2017	94.8094100952148
2018	95.9792175292969
2019	97.5718231201172
2020	96.3666610717773
2021	95.0670928955078
2022	96.3259429931641
2023	97.8290481567383