Year	% (cumulative)
1970	43.3197784423828
1974	48.8478012084961
1979	58.4203491210938
1986	64.0737915039062
1987	65.5588226318359
1988	67.1008377075195
1989	68.5846710205078
1990	70.3795928955078
1991	71.8273696899414
1992	74.1020965576172
1993	75.6411666870117
1994	76.8679733276367
1995	78.1473693847656
2004	88.4231033325195
2005	89.1418304443359
2006	89.8014526367188
2007	90.4075012207031
2008	85.7820510864258
2009	86.4433135986328
2010	87.0703430175781
2011	87.7039489746094
2012	88.334358215332
2013	88.9272308349609
2014	89.4749069213867
2015	90.019401550293
2016	90.5436477661133
2017	91.0670318603516
2018	95.7758865356445
2019	92.0146331787109
2020	96.3844223022461
2021	94.4630737304688
2022	94.5272445678711