Year	years
1960	53.364
1961	53.895
1962	54.401
1963	54.88
1964	55.305
1965	55.664
1966	55.942
1967	56.213
1968	56.487
1969	56.654
1970	57.152
1971	57.633
1972	58.205
1973	58.837
1974	59.526
1975	60.232
1976	60.89
1977	61.559
1978	62.153
1979	62.696
1980	63.191
1981	63.662
1982	64.11
1983	64.528
1984	65.171
1985	65.811
1986	66.535
1987	67.3
1988	68.056
1989	68.749
1990	69.348
1991	69.625
1992	70.117
1993	70.345
1994	70.757
1995	71.041
1996	71.362
1997	71.681
1998	72.045
1999	72.463
2000	72.839
2001	73.24
2002	73.613
2003	73.975
2004	74.279
2005	74.514
2006	74.689
2007	74.844
2008	74.983
2009	75.184
2010	75.43
2011	75.743
2012	76.062
2013	76.369
2014	76.622
2015	76.789
2016	76.763
2017	76.972
2018	77.094
2019	77.297
2020	72.153
2021	73.67
2022	77.894