Year	years
1960	37.486
1961	38.825
1962	40.177
1963	41.401
1964	42.608
1965	43.869
1966	45.053
1967	46.254
1968	47.521
1969	48.732
1970	49.753
1971	50.98
1972	52.2
1973	53.439
1974	54.697
1975	55.87
1976	57.371
1977	58.391
1978	59.873
1979	61.309
1980	62.689
1981	63.909
1982	65.257
1983	66.489
1984	67.432
1985	68.642
1986	69.428
1987	70.201
1988	70.983
1989	71.684
1990	72.326
1991	72.989
1992	73.364
1993	73.938
1994	74.258
1995	74.865
1996	75.14
1997	75.389
1998	76.083
1999	76.288
2000	76.533
2001	76.707
2002	76.769
2003	77.238
2004	77.401
2005	77.517
2006	77.59
2007	77.569
2008	77.736
2009	77.803
2010	78.498
2011	78.672
2012	78.9
2013	79.084
2014	79.313
2015	79.543
2016	79.799
2017	79.839
2018	79.898
2019	79.947
2020	76.788
2021	74.716
2022	76.046