Year	years
1960	60.702
1961	61.471
1962	62.154
1963	62.735
1964	63.203
1965	63.558
1966	63.789
1967	64.056
1968	64.313
1969	64.662
1970	65.083
1971	65.787
1972	66.457
1973	67.087
1974	67.653
1975	68.079
1976	68.381
1977	68.603
1978	68.761
1979	68.989
1980	69.254
1981	69.586
1982	69.939
1983	70.27
1984	70.543
1985	70.732
1986	70.833
1987	70.888
1988	70.888
1989	69.936
1990	71.097
1991	71.207
1992	71.462
1993	71.8
1994	72.096
1995	72.385
1996	72.675
1997	72.97
1998	73.279
1999	73.622
2000	74.001
2001	74.414
2002	74.824
2003	75.218
2004	75.544
2005	75.829
2006	76.012
2007	76.154
2008	76.225
2009	76.343
2010	76.448
2011	76.627
2012	76.819
2013	77.038
2014	77.248
2015	77.468
2016	77.653
2017	77.795
2018	77.863
2019	77.81
2020	76.657
2021	76.223
2022	76.826