Year	years
1960	58.926
1961	60.033
1962	61.109
1963	61.989
1964	63.229
1965	64.118
1966	64.959
1967	65.998
1968	66.877
1969	68.099
1970	69.132
1971	69.728
1972	69.817
1973	69.907
1974	70.338
1975	70.35
1976	70.839
1977	71.356
1978	71.486
1979	71.694
1980	72.379
1981	73.066
1982	73.418
1983	74.163
1984	74.567
1985	75.2
1986	75.609
1987	76.094
1988	76.802
1989	77.123
1990	76.799
1991	77.547
1992	77.866
1993	77.945
1994	77.979
1995	77.84
1996	77.882
1997	78.363
1998	78.551
1999	78.698
2000	78.881
2001	78.94
2002	78.973
2003	79.11
2004	79.087
2005	79.187
2006	79.282
2007	79.302
2008	79.36
2009	79.589
2010	80.105
2011	80.617
2012	81.072
2013	81.542
2014	81.772
2015	82.004
2016	82.203
2017	82.303
2018	82.281
2019	82.266
2020	80.023
2021	81.463
2022	82.752