Year	years
1960	61.431
1961	61.803
1962	62.125
1963	62.223
1964	62.418
1965	62.754
1966	62.945
1967	63.213
1968	63.334
1969	63.656
1970	63.873
1971	64.208
1972	64.535
1973	64.611
1974	64.825
1975	64.962
1976	65.161
1977	65.364
1978	65.701
1979	66.041
1980	66.177
1981	66.579
1982	66.89
1983	67.195
1984	67.507
1985	67.93
1986	68.18
1987	68.095
1988	53.9
1989	68.703
1990	68.821
1991	68.643
1992	68.627
1993	68.841
1994	69.073
1995	69.311
1996	69.783
1997	69.91
1998	70.514
1999	70.257
2000	70.624
2001	70.932
2002	71.018
2003	71.436
2004	71.421
2005	71.792
2006	71.987
2007	72.327
2008	72.398
2009	72.813
2010	73.16
2011	73.305
2012	73.454
2013	73.676
2014	74.058
2015	74.436
2016	74.664
2017	74.906
2018	75.064
2019	75.439
2020	72.173
2021	72.043
2022	73.372