Year	years
1960	44.767
1961	45.44
1962	46.049
1963	46.689
1964	47.446
1965	48.059
1966	48.728
1967	49.366
1968	50.038
1969	50.633
1970	51.038
1971	51.387
1972	51.656
1973	51.898
1974	52.184
1975	52.65
1976	52.917
1977	53.37
1978	53.855
1979	54.474
1980	55.061
1981	55.662
1982	56.275
1983	56.682
1984	57.16
1985	57.575
1986	57.992
1987	58.581
1988	59.141
1989	59.322
1990	59.77
1991	59.936
1992	60.261
1993	60.379
1994	60.336
1995	60.259
1996	60.063
1997	60.452
1998	60.609
1999	60.819
2000	61.028
2001	61.185
2002	61.268
2003	61.347
2004	61.593
2005	61.656
2006	61.891
2007	62.228
2008	62.399
2009	62.8
2010	63.105
2011	63.346
2012	63.578
2013	63.911
2014	64.155
2015	64.485
2016	64.768
2017	65.083
2018	65.31
2019	65.687
2020	64.532
2021	64.364
2022	64.691