Year	years
1960	35.098
1961	35.568
1962	35.989
1963	36.496
1964	36.948
1965	37.445
1966	37.898
1967	38.43
1968	38.869
1969	39.349
1970	39.871
1971	40.347
1972	40.915
1973	41.394
1974	41.954
1975	42.444
1976	43.039
1977	43.44
1978	43.583
1979	44.558
1980	45.153
1981	44.476
1982	46.377
1983	46.923
1984	47.493
1985	48.189
1986	48.71
1987	49.409
1988	50.051
1989	50.635
1990	51.319
1991	52.127
1992	52.941
1993	53.748
1994	54.721
1995	55.464
1996	56.009
1997	56.06
1998	56.554
1999	56.816
2000	56.942
2001	57.043
2002	57.08
2003	57.586
2004	58.088
2005	58.394
2006	59.06
2007	59.394
2008	60.082
2009	60.427
2010	60.717
2011	61.526
2012	62.096
2013	62.114
2014	62.269
2015	62.494
2016	63.013
2017	62.995
2018	63.04
2019	63.755
2020	62.612
2021	62.083
2022	62.906