Year	years
1960	64.634
1961	65.074
1962	65.404
1963	65.278
1964	65.52
1965	65.908
1966	65.981
1967	66.296
1968	66.652
1969	67.011
1970	67.17
1971	67.559
1972	67.96
1973	68.004
1974	68.152
1975	68.157
1976	68.355
1977	68.718
1978	69.04
1979	69.403
1980	69.335
1981	69.838
1982	70.153
1983	70.564
1984	70.719
1985	70.874
1986	71.239
1987	70.913
1988	54.599
1989	71.877
1990	71.989
1991	72.122
1992	72.404
1993	72.69
1994	72.948
1995	73.023
1996	73.589
1997	73.293
1998	74.033
1999	73.767
2000	74.152
2001	74.587
2002	74.707
2003	75.375
2004	75.116
2005	75.781
2006	76.011
2007	76.322
2008	76.572
2009	77.149
2010	77.437
2011	77.713
2012	77.483
2013	77.913
2014	78.498
2015	78.833
2016	79.203
2017	79.381
2018	79.601
2019	79.856
2020	76.996
2021	77.35
2022	78.447