Year	years
1960	65.341
1961	65.552
1962	66.187
1963	66.578
1964	66.639
1965	67.019
1966	67.856
1967	67.623
1968	68.014
1969	68.115
1970	68.617
1971	69.094
1972	69.847
1973	70.073
1974	70.686
1975	70.881
1976	71.11
1977	71.53
1978	71.54
1979	71.543
1980	71.809
1981	71.824
1982	71.806
1983	71.397
1984	71.514
1985	71.981
1986	72.075
1987	72.265
1988	72.678
1989	72.951
1990	73.475
1991	73.885
1992	74.101
1993	74.197
1994	74.457
1995	74.861
1996	74.646
1997	74.719
1998	74.388
1999	72.973
2000	74.4
2001	75
2002	75
2003	75.1
2004	75.5
2005	75.6
2006	76.1
2007	76.5
2008	76.6
2009	76.7
2010	77
2011	77.2
2012	77.5
2013	77.9
2014	78
2015	77.9
2016	78.3
2017	78.1
2018	78.4
2019	78.6
2020	77.5
2021	75.7
2022	78.12