Year	years
1960	44.739
1961	46.258
1962	48.04
1963	47.322
1964	48.026
1965	50.357
1966	53.498
1967	55.809
1968	56.821
1969	57.138
1970	58.928
1971	59.574
1972	59.795
1973	60.3
1974	60.126
1975	60.112
1976	60.415
1977	60.582
1978	61.007
1979	61.072
1980	61.211
1981	61.091
1982	61.313
1983	61.319
1984	61.552
1985	61.278
1986	58.944
1987	62.643
1988	63.141
1989	62.018
1990	63.536
1991	63.571
1992	63.513
1993	63.441
1994	63.384
1995	63.321
1996	63.309
1997	63.331
1998	63.408
1999	63.405
2000	63.43
2001	63.739
2002	64.403
2003	65.037
2004	65.923
2005	66.06
2006	66.871
2007	66.993
2008	67.496
2009	67.765
2010	67.812
2011	67.27
2012	68.601
2013	69.034
2014	69.895
2015	70.16
2016	70.376
2017	71.377
2018	71.445
2019	71.62
2020	70.878
2021	70.419
2022	71.938