Year	years
1960	58.647
1961	59.407
1962	59.529
1963	60.152
1964	60.609
1965	61.248
1966	61.801
1967	62.348
1968	62.928
1969	63.224
1970	64.299
1971	64.933
1972	65.42
1973	65.936
1974	66.526
1975	67.075
1976	67.554
1977	67.957
1978	68.313
1979	68.587
1980	68.762
1981	69.442
1982	69.723
1983	70.197
1984	70.441
1985	70.596
1986	71.037
1987	71.047
1988	71.252
1989	71.348
1990	71.532
1991	71.832
1992	71.806
1993	71.925
1994	71.853
1995	72.143
1996	72.111
1997	72.703
1998	72.668
1999	72.254
2000	72.478
2001	71.201
2002	72.662
2003	71.94
2004	72.514
2005	72.782
2006	72.742
2007	73.058
2008	72.436
2009	72.579
2010	72.89
2011	72.913
2012	73.036
2013	73.196
2014	72.853
2015	73.006
2016	72.058
2017	71.943
2018	71.979
2019	72.161
2020	71.095
2021	70.554
2022	71.105