Year	scale 1-100
1970	57.9619565217391
1971	57.8260869565217
1972	58.3423913043478
1973	59.0217391304348
1974	59.1576086956522
1975	59.1576086956522
1976	59.1576086956522
1977	59.1576086956522
1978	59.1576086956522
1979	59.1576086956522
1980	59.1576086956522
1981	59.2934782608696
1982	59.2934782608696
1983	59.2934782608696
1984	59.2934782608696
1985	59.2934782608696
1986	60.1630434782609
1987	60.1630434782609
1988	59.9728260869565
1989	60.1086956521739
1990	60.2445652173913
1991	60.8967391304348
1992	61.7934782608696
1993	62.4184782608696
1994	63.070652173913
1995	63.7228260869565
1996	64.9184782608696
1997	65.7065217391304
1998	65.9782608695652
1999	66.25
2000	67.2282608695652
2001	67.4728260869565
2002	69.1847826086957
2003	72.0652173913043
2004	73.9673913043478
2005	75.7880434782609
2006	77.445652173913
2007	78.0978260869565
2008	78.5869565217391
2009	79.429347826087
2010	80.5978260869565
2011	81.1684782608696
2012	81.2771739130435
2013	81.6576086956522
2014	81.6576086956522
2015	81.7391304347826
2016	82.1195652173913
2017	82.3641304347826
2018	82.7173913043478
2019	83.125
2020	83.5326086956522
2021	84.1304347826087
2022	84.6195652173913
2023	85.7880434782609