Year	years
1960	60.302
1961	60.589
1962	60.964
1963	61.378
1964	61.84
1965	61.996
1966	62.338
1967	62.758
1968	63.173
1969	63.825
1970	63.969
1971	64.391
1972	64.727
1973	64.61
1974	65.066
1975	65.175
1976	65.701
1977	65.578
1978	65.815
1979	65.996
1980	66.169
1981	66.413
1982	66.609
1983	66.826
1984	67.046
1985	67.336
1986	67.701
1987	68.002
1988	68.173
1989	68.317
1990	68.308
1991	68.109
1992	68.036
1993	67.734
1994	67.621
1995	67.691
1996	67.764
1997	67.856
1998	68.103
1999	68.438
2000	68.76
2001	69.126
2002	69.601
2003	70.067
2004	70.548
2005	70.301
2006	70.585
2007	71.034
2008	71.445
2009	71.572
2010	71.813
2011	72.225
2012	72.47
2013	72.841
2014	73.13
2015	73.324
2016	73.505
2017	73.773
2018	73.815
2019	73.883
2020	72.789
2021	73.39
2022	74.293