Year	years
1960	56.063
1961	56.367
1962	56.673
1963	56.925
1964	57.261
1965	57.425
1966	57.795
1967	58.121
1968	58.458
1969	58.942
1970	59.241
1971	59.645
1972	60.026
1973	60.109
1974	60.623
1975	60.993
1976	61.293
1977	61.541
1978	61.678
1979	61.87
1980	61.729
1981	61.739
1982	61.957
1983	62.186
1984	62.546
1985	62.863
1986	63.115
1987	63.463
1988	64.373
1989	64.533
1990	64.559
1991	64.218
1992	62.281
1993	62.085
1994	62.377
1995	62.785
1996	62.446
1997	63.425
1998	64.523
1999	65.266
2000	65.956
2001	66.395
2002	67.251
2003	67.913
2004	68.534
2005	68.995
2006	69.536
2007	69.697
2008	70.109
2009	70.507
2010	70.353
2011	70.824
2012	70.949
2013	71.334
2014	71.644
2015	71.868
2016	72.088
2017	72.34
2018	72.599
2019	73.01
2020	70.17
2021	73.734
2022	73.518