Year	scale 1-100
1970	36.7
1971	36.7
1972	36.8
1973	38.275
1974	38.525
1975	38.625
1976	38.725
1977	38.725
1978	39.35
1979	39.35
1980	40.125
1981	40.125
1982	40.125
1983	40.125
1984	40.125
1985	40.125
1986	40.25
1987	40.725
1988	40.8
1989	40.8
1990	41.35
1991	41.85
1992	42.375
1993	43.325
1994	43.65
1995	43.775
1996	43.775
1997	44.675
1998	45.225
1999	45.25
2000	46.175
2001	47.05
2002	47.9
2003	48.55
2004	48.8
2005	50.325
2006	50.95
2007	52.9
2008	54.325
2009	56.475
2010	56.9
2011	57.575
2012	58.025
2013	58.525
2014	58.975
2015	59.175
2016	60.4
2017	61.825
2018	63.5
2019	64.325
2020	65.225
2021	65.375
2022	65.9
2023	67.75