Year	years
1960	64.173
1961	64.512
1962	65.038
1963	64.94
1964	65.905
1965	66.318
1966	66.715
1967	67.11
1968	67.511
1969	67.936
1970	68.398
1971	68.918
1972	69.462
1973	70.02
1974	70.57
1975	71.079
1976	71.524
1977	71.895
1978	72.201
1979	72.447
1980	72.752
1981	72.939
1982	73.13
1983	73.309
1984	73.468
1985	73.605
1986	73.725
1987	73.825
1988	73.913
1989	73.981
1990	74.039
1991	74.093
1992	74.162
1993	74.261
1994	74.411
1995	74.623
1996	74.903
1997	75.222
1998	75.564
1999	75.893
2000	76.183
2001	76.421
2002	76.612
2003	76.773
2004	76.912
2005	77.047
2006	77.179
2007	77.307
2008	77.429
2009	77.548
2010	77.661
2011	77.76
2012	77.833
2013	77.87
2014	77.853
2015	77.772
2016	77.643
2017	77.529
2018	77.496
2019	77.611
2020	77.567
2021	73.683
2022	78.155