Year	years
1960	65.181
1961	65.439
1962	65.907
1963	66.384
1964	66.185
1965	66.729
1966	67.173
1967	67.217
1968	67.673
1969	68.275
1970	68.493
1971	68.823
1972	69.079
1973	69.282
1974	69.497
1975	69.818
1976	69.829
1977	70.321
1978	70.412
1979	70.891
1980	70.644
1981	71.394
1982	71.605
1983	71.822
1984	71.724
1985	72.268
1986	72.416
1987	72.075
1988	72.552
1989	72.579
1990	72.685
1991	72.671
1992	72.489
1993	72.582
1994	72.682
1995	73.237
1996	73.42
1997	73.315
1998	73.091
1999	73.324
2000	73.583
2001	73.807
2002	74.339
2003	74.631
2004	74.791
2005	75.596
2006	75.952
2007	75.784
2008	75.873
2009	76.427
2010	76.572
2011	76.854
2012	77.205
2013	77.436
2014	77.934
2015	78.131
2016	78.43
2017	78.224
2018	78.153
2019	78.429
2020	77.874
2021	76.681
2022	76.461