Year	years
1960	58.146
1961	58.5
1962	58.818
1963	59.113
1964	59.391
1965	59.684
1966	59.903
1967	60.12
1968	60.352
1969	60.593
1970	60.958
1971	61.09
1972	61.23
1973	61.395
1974	61.588
1975	61.815
1976	62.1
1977	62.337
1978	62.544
1979	62.887
1980	63.192
1981	63.473
1982	63.828
1983	64.05
1984	64.431
1985	64.751
1986	65.096
1987	65.436
1988	65.722
1989	65.819
1990	66.207
1991	66.347
1992	66.468
1993	66.603
1994	66.706
1995	66.779
1996	66.842
1997	66.951
1998	66.974
1999	67.029
2000	67.063
2001	67.106
2002	66.97
2003	67.276
2004	67.46
2005	67.61
2006	67.899
2007	68.334
2008	68.659
2009	68.962
2010	69.202
2011	69.505
2012	69.829
2013	70.179
2014	70.253
2015	70.548
2016	70.826
2017	70.986
2018	70.946
2019	70.961
2020	70.398
2021	67.434
2022	67.645