Year	years
1960	33.275
1961	40.468
1962	50.818
1963	51.408
1964	52.156
1965	52.912
1966	53.637
1967	54.351
1968	55.057
1969	55.738
1970	56.607
1971	57.565
1972	58.418
1973	59.389
1974	60.168
1975	60.917
1976	61.796
1977	62.538
1978	63.218
1979	63.865
1980	64.42
1981	64.975
1982	65.463
1983	65.904
1984	66.3
1985	66.643
1986	66.97
1987	67.288
1988	67.581
1989	67.838
1990	68.005
1991	68.169
1992	68.734
1993	69.216
1994	69.52
1995	70.008
1996	70.266
1997	70.672
1998	71.172
1999	71.419
2000	71.881
2001	72.606
2002	72.985
2003	73.371
2004	73.748
2005	74.111
2006	74.504
2007	74.762
2008	74.872
2009	75.343
2010	75.599
2011	75.903
2012	76.192
2013	76.452
2014	76.717
2015	76.977
2016	77.218
2017	77.248
2018	77.744
2019	77.968
2020	78.077
2021	78.211
2022	78.587