Year	years
1960	61.037
1961	61.856
1962	62.511
1963	63.274
1964	63.948
1965	64.555
1966	65.171
1967	65.553
1968	65.883
1969	66.2
1970	66.688
1971	67.163
1972	67.672
1973	68.216
1974	68.862
1975	69.405
1976	69.648
1977	70.041
1978	70.132
1979	70.34
1980	70.543
1981	70.7
1982	70.875
1983	71.081
1984	71.036
1985	70.799
1986	71.239
1987	71.676
1988	71.755
1989	71.781
1990	72.349
1991	72.089
1992	51.785
1993	51.519
1994	67.209
1995	70.284
1996	73.43
1997	73.686
1998	73.901
1999	75.076
2000	74.496
2001	75.06
2002	74.612
2003	75.782
2004	76.133
2005	75.42
2006	76.247
2007	76.161
2008	76.838
2009	76.976
2010	77.073
2011	77.007
2012	77.191
2013	76.33
2014	75.659
2015	76.182
2016	76.808
2017	76.935
2018	77.093
2019	77.241
2020	76.225
2021	75.3
2022	75.293