Year	years
1960	62.406
1961	63.489
1962	64.576
1963	65.798
1964	66.726
1965	66.773
1966	66.439
1967	66.599
1968	67.409
1969	67.81
1970	68.219
1971	68.462
1972	68.846
1973	69.221
1974	69.606
1975	69.99
1976	70.324
1977	69.57
1978	69.793
1979	70.051
1980	70.375
1981	70.835
1982	71.115
1983	70.977
1984	71.826
1985	72.107
1986	72.444
1987	72.463
1988	72.711
1989	72.952
1990	73.216
1991	73.501
1992	73.779
1993	74.068
1994	74.349
1995	74.767
1996	74.999
1997	75.23
1998	75.483
1999	75.46
2000	75.121
2001	75.425
2002	75.464
2003	75.825
2004	74.162
2005	76.515
2006	76.75
2007	77.355
2008	77.341
2009	77.829
2010	77.632
2011	78.067
2012	77.895
2013	77.903
2014	78.004
2015	78.052
2016	77.814
2017	77.772
2018	77.796
2019	77.834
2020	77.869
2021	77.898
2022	78.298