Year	years
1960	64.845
1961	64.742
1962	65.831
1963	66.671
1964	66.86
1965	65.602
1966	66.569
1967	66.8
1968	66.645
1969	67.418
1970	68.66
1971	68.699
1972	68.628
1973	68.784
1974	68.896
1975	69.047
1976	69.182
1977	69.207
1978	69.279
1979	69.322
1980	69.432
1981	69.652
1982	69.962
1983	69.529
1984	69.678
1985	69.472
1986	70.351
1987	70.49
1988	71.204
1989	71.224
1990	71.463
1991	72.957
1992	72.362
1993	72.533
1994	72.725
1995	72.915
1996	73.093
1997	73.279
1998	73.463
1999	73.635
2000	73.806
2001	73.975
2002	74.142
2003	74.307
2004	74.471
2005	74.634
2006	74.795
2007	74.945
2008	75.115
2009	75.281
2010	75.447
2011	75.14
2012	76.12
2013	76.041
2014	77.11
2015	76.261
2016	76.411
2017	75.826
2018	77.207
2019	76.875
2020	77.021
2021	77.254
2022	77.502