Year	years
1960	71.51
1961	72.214
1962	71.5
1963	71.749
1964	73.08
1965	72.536
1966	72.614
1967	72.782
1968	72.773
1969	73.042
1970	73.259
1971	72.881
1972	73.93
1973	74.362
1974	73.846
1975	73.843
1976	73.707
1977	75.358
1978	75.305
1979	76.141
1980	75.407
1981	75.971
1982	76.395
1983	76.43
1984	76.656
1985	77.159
1986	77.817
1987	77.432
1988	78.664
1989	77.894
1990	78.617
1991	79.1
1992	79.1
1993	79.4
1994	79.7
1995	80.2
1996	79.9
1997	79.8
1998	80.5
1999	81.1
2000	81.1
2001	81
2002	81.5
2003	80.8
2004	82.4
2005	82.3
2006	81.9
2007	82.2
2008	83.1
2009	83.3
2010	83.5
2011	83.6
2012	83.8
2013	83.9
2014	85.2
2015	84.7
2016	85.4
2017	84.4
2018	84.6
2019	85.2
2020	84.5
2021	84.8
2022	85.3