Year	years
1960	62.651
1961	62.906
1962	63.484
1963	63.483
1964	64.302
1965	64.695
1966	65.077
1967	65.462
1968	65.858
1969	66.282
1970	66.75
1971	67.275
1972	67.826
1973	68.386
1974	68.924
1975	69.404
1976	69.808
1977	70.137
1978	70.407
1979	70.63
1980	70.904
1981	71.095
1982	71.292
1983	71.453
1984	71.622
1985	71.754
1986	71.853
1987	71.918
1988	71.959
1989	71.975
1990	71.978
1991	71.984
1992	72.007
1993	72.072
1994	72.194
1995	72.388
1996	72.656
1997	72.971
1998	73.31
1999	73.644
2000	73.941
2001	74.183
2002	74.381
2003	74.545
2004	74.684
2005	74.818
2006	74.95
2007	75.079
2008	75.209
2009	75.335
2010	75.46
2011	75.575
2012	75.657
2013	75.688
2014	75.644
2015	75.505
2016	75.297
2017	75.118
2018	75.067
2019	75.244
2020	75.044
2021	71.245
2022	75.793