Year	scale 1-100
1970	23.75
1971	23.75
1972	23.75
1973	23.75
1974	23.75
1975	23.75
1976	23.75
1977	23.75
1978	23.75
1979	23.75
1980	23.75
1981	23.75
1982	23.75
1983	23.75
1984	23.75
1985	23.75
1986	23.75
1987	23.75
1988	23.75
1989	23.75
1990	23.75
1991	23.75
1992	23.75
1993	23.75
1994	23.75
1995	23.75
1996	23.75
1997	23.75
1998	23.75
1999	23.75
2000	23.75
2001	23.75
2002	23.75
2003	23.75
2004	23.75
2005	23.75
2006	23.75
2007	23.75
2008	26.875
2009	26.875
2010	26.875
2011	26.875
2012	26.875
2013	26.875
2014	26.875
2015	26.875
2016	26.875
2017	26.875
2018	26.875
2019	26.875
2020	26.875
2021	26.875
2022	26.875
2023	26.875