Year	years
1960	57.102
1961	57.767
1962	58.474
1963	59.039
1964	59.625
1965	59.485
1966	59.691
1967	59.905
1968	60.062
1969	60.224
1970	60.402
1971	60.392
1972	60.507
1973	60.697
1974	60.841
1975	61.049
1976	61.25
1977	61.453
1978	61.684
1979	61.878
1980	62.034
1981	62.251
1982	62.455
1983	62.593
1984	62.872
1985	63.058
1986	62.96
1987	63.186
1988	63.437
1989	64.01
1990	64.23
1991	64.453
1992	64.65
1993	64.98
1994	65.272
1995	65.337
1996	65.668
1997	65.697
1998	65.594
1999	65.443
2000	65.508
2001	65.482
2002	65.531
2003	65.596
2004	66.416
2005	67.002
2006	67.571
2007	68.204
2008	68.816
2009	69.505
2010	69.894
2011	69.914
2012	69.764
2013	69.682
2014	69.782
2015	70.8
2016	71.592
2017	72.417
2018	72.553
2019	72.242
2020	72.561
2021	70.274
2022	70.289