Year	years
1960	45.281
1961	45.674
1962	46.09
1963	46.446
1964	46.622
1965	47.036
1966	47.456
1967	47.957
1968	48.421
1969	48.973
1970	49.434
1971	49.25
1972	50.516
1973	51.179
1974	51.569
1975	51.819
1976	52.039
1977	52.603
1978	53.1
1979	53.559
1980	53.944
1981	54.282
1982	54.664
1983	55.083
1984	55.656
1985	55.974
1986	56.487
1987	56.648
1988	57.058
1989	57.141
1990	57.518
1991	57.714
1992	57.896
1993	57.715
1994	57.392
1995	58.084
1996	57.936
1997	57.689
1998	57.681
1999	58.12
2000	58.047
2001	58.444
2002	58.683
2003	59.209
2004	59.26
2005	60.184
2006	60.419
2007	61.018
2008	61.26
2009	61.471
2010	62.267
2011	62.409
2012	63.083
2013	63.225
2014	64.091
2015	64.299
2016	64.52
2017	65.337
2018	65.583
2019	65.563
2020	65.461
2021	65.019
2022	65.503