Year	years
1960	63.494
1961	63.477
1962	63.504
1963	63.942
1964	64.177
1965	64.494
1966	64.898
1967	65.043
1968	65.128
1969	65.371
1970	65.695
1971	65.916
1972	66.268
1973	66.595
1974	66.965
1975	67.183
1976	66.792
1977	67.103
1978	67.29
1979	67.543
1980	71.9
1981	71.7
1982	71.5
1983	72.4
1984	73.3
1985	73.3
1986	73.6
1987	73.9
1988	73.1
1989	72.9
1990	73.1
1991	72.4
1992	72.3
1993	70.8
1994	70.3
1995	69.4
1996	69.7
1997	69.9
1998	70.4
1999	70.9
2000	71.2
2001	71.3
2002	71.6
2003	71.5
2004	72
2005	71.8
2006	72
2007	72.3
2008	72.4
2009	73.25
2010	73.41
2011	73.57
2012	74.29
2013	75.23
2014	75.82
2015	76.26
2016	76.61
2017	76.92
2018	77.19
2019	77.3
2020	75.53
2021	74.03
2022	78.41