Year	years
1960	67.333
1961	68.145
1962	69.005
1963	69.73
1964	70.145
1965	70.662
1966	70.842
1967	71.277
1968	71.427
1969	71.888
1970	72.079
1971	72.492
1972	72.632
1973	72.919
1974	73.442
1975	73.999
1976	74.438
1977	74.495
1978	74.56
1979	74.549
1980	74.7
1981	75.2
1982	75.3
1983	75.7
1984	75.8
1985	76.4
1986	76.5
1987	76.7
1988	76.9
1989	77.2
1990	77.6
1991	77.9
1992	78.2
1993	78.3
1994	78.4
1995	78.6
1996	78.9
1997	79.1
1998	79.4
1999	79.6
2000	80
2001	80.3
2002	80.6
2003	81.6
2004	82
2005	82.5
2006	82.6
2007	82.9
2008	83.3
2009	83.7
2010	84
2011	84.1
2012	84.3
2013	84.5
2014	84.8
2015	85.1
2016	85.1
2017	85.4
2018	85.5
2019	85.9
2020	85.9
2021	85.5
2022	85.2