Year	scale 1-100
1970	46.8872549019608
1971	47.2671568627451
1972	47.5
1973	47.9411764705882
1974	48.6764705882353
1975	48.9950980392157
1976	49.2892156862745
1977	49.4117647058824
1978	49.5833333333333
1979	49.9877450980392
1980	50.0857843137255
1981	50.9191176470588
1982	51.1029411764706
1983	51.1029411764706
1984	51.7401960784314
1985	52.2058823529412
1986	52.3774509803922
1987	52.4387254901961
1988	52.9411764705882
1989	53.3210784313725
1990	54.0441176470588
1991	54.3995098039216
1992	55.1470588235294
1993	55.9191176470588
1994	57.1200980392157
1995	57.7941176470588
1996	59.0441176470588
1997	60.0735294117647
1998	60.4044117647059
1999	61.5808823529412
2000	62.6838235294118
2001	63.1127450980392
2002	64.3259803921569
2003	65.5147058823529
2004	66.4950980392157
2005	67.6960784313726
2006	68.7009803921569
2007	69.203431372549
2008	70.1470588235294
2009	70.9803921568627
2010	71.6421568627451
2011	72.0833333333333
2012	72.6348039215686
2013	73.0147058823529
2014	73.5294117647059
2015	73.7377450980392
2016	74.4362745098039
2017	75.0122549019608
2018	75.1225490196078
2019	75.3553921568627
2020	75.9926470588235
2021	76.6911764705882
2022	77.4019607843137
2023	78.2843137254902