Year	years
1960	46.249
1961	46.963
1962	47.575
1963	48.102
1964	48.53
1965	48.872
1966	49.023
1967	49.362
1968	49.884
1969	50.354
1970	51.261
1971	52.275
1972	53.408
1973	54.601
1974	55.732
1975	56.726
1976	50.371
1977	58.354
1978	59.031
1979	59.577
1980	59.997
1981	60.666
1982	56.905
1983	61.928
1984	62.508
1985	63.085
1986	63.67
1987	64.234
1988	64.814
1989	65.3
1990	65.582
1991	66.052
1992	66.373
1993	66.74
1994	67.24
1995	67.785
1996	68.468
1997	69.172
1998	69.736
1999	70.529
2000	71.105
2001	71.602
2002	72.042
2003	72.447
2004	72.809
2005	72.701
2006	73.423
2007	73.682
2008	73.899
2009	74.127
2010	74.29
2011	74.525
2012	74.731
2013	74.927
2014	75.1
2015	75.178
2016	75.392
2017	75.52
2018	75.571
2019	75.812
2020	75.545
2021	72.651
2022	71.754