Year	years
1960	62.896
1961	63.185
1962	63.433
1963	63.732
1964	64.05
1965	64.362
1966	64.659
1967	64.948
1968	65.328
1969	65.646
1970	65.926
1971	66.151
1972	66.413
1973	66.488
1974	67.001
1975	67.221
1976	67.84
1977	67.88
1978	67.562
1979	67.366
1980	67.521
1981	67.746
1982	68.436
1983	69.161
1984	69.351
1985	69.257
1986	69.285
1987	68.924
1988	69.215
1989	69.598
1990	70.133
1991	69.616
1992	70.668
1993	70.656
1994	70.851
1995	70.763
1996	70.71
1997	71.054
1998	71.456
1999	71.771
2000	72.041
2001	72.11
2002	72.232
2003	72.402
2004	72.478
2005	72.765
2006	72.855
2007	72.678
2008	72.667
2009	72.579
2010	72.731
2011	72.564
2012	72.753
2013	73.024
2014	73.366
2015	73.104
2016	73.537
2017	73.632
2018	73.806
2019	71.205
2020	72.677
2021	71.598
2022	74.358