Year	years
1960	64.841
1961	65.29
1962	65.397
1963	65.668
1964	65.953
1965	66.065
1966	66.159
1967	66.519
1968	66.607
1969	66.697
1970	66.759
1971	66.823
1972	66.907
1973	67.229
1974	67.294
1975	58.128
1976	33.737
1977	59.284
1978	59.382
1979	59.467
1980	59.665
1981	59.915
1982	45.128
1983	59.955
1984	60.304
1985	60.486
1986	60.965
1987	61.428
1988	61.718
1989	64.163
1990	64.475
1991	71.176
1992	71.192
1993	71.382
1994	71.681
1995	72.043
1996	72.293
1997	72.778
1998	72.944
1999	73.49
2000	73.931
2001	74.365
2002	75.064
2003	75.593
2004	75.976
2005	76.273
2006	76.08
2007	77.08
2008	77.584
2009	77.889
2010	78.156
2011	78.404
2012	78.628
2013	78.765
2014	78.973
2015	79.229
2016	79.505
2017	79.654
2018	79.729
2019	79.236
2020	77.804
2021	75.047
2022	74.416