Year	years
1960	55.099
1961	55.714
1962	56.306
1963	56.919
1964	57.385
1965	57.826
1966	58.214
1967	58.529
1968	58.84
1969	59.147
1970	59.459
1971	59.913
1972	60.383
1973	60.806
1974	61.354
1975	61.913
1976	62.415
1977	62.921
1978	63.373
1979	63.749
1980	64.174
1981	64.451
1982	64.75
1983	64.901
1984	65.024
1985	63.477
1986	64.975
1987	64.756
1988	64.605
1989	64.576
1990	64.539
1991	64.652
1992	64.86
1993	65.221
1994	65.533
1995	65.885
1996	66.13
1997	66.431
1998	66.662
1999	66.884
2000	67.312
2001	67.545
2002	68.076
2003	68.622
2004	69.032
2005	69.513
2006	69.961
2007	70.374
2008	70.933
2009	71.487
2010	71.817
2011	72.141
2012	72.455
2013	72.725
2014	72.985
2015	73.252
2016	73.519
2017	73.759
2018	73.842
2019	73.8
2020	71.537
2021	69.404
2022	70.319