Year	years
1960	42.761
1961	44.693
1962	45.196
1963	45.737
1964	46.322
1965	46.923
1966	47.522
1967	48.172
1968	48.784
1969	49.344
1970	49.848
1971	50.319
1972	50.77
1973	51.206
1974	51.701
1975	52.258
1976	52.936
1977	53.72
1978	54.564
1979	55.467
1980	56.423
1981	57.297
1982	58.207
1983	59.067
1984	59.872
1985	60.722
1986	61.513
1987	62.207
1988	62.864
1989	63.464
1990	64.019
1991	64.52
1992	64.972
1993	65.495
1994	65.986
1995	66.385
1996	66.875
1997	67.268
1998	67.683
1999	68.126
2000	68.529
2001	68.902
2002	69.239
2003	69.593
2004	69.869
2005	70.398
2006	70.876
2007	71.34
2008	71.757
2009	72.142
2010	72.485
2011	73.023
2012	73.525
2013	73.976
2014	74.39
2015	74.777
2016	75.176
2017	75.664
2018	76.086
2019	76.448
2020	76.308
2021	76.398
2022	77.177