Year	years
1960	60.743
1961	61.456
1962	62.418
1963	63.178
1964	63.96
1965	64.692
1966	65.417
1967	66.224
1968	66.882
1969	67.555
1970	68.155
1971	68.74
1972	69.078
1973	69.656
1974	70.236
1975	70.556
1976	71.057
1977	71.298
1978	71.806
1979	72.032
1980	72.269
1981	72.764
1982	72.942
1983	73.129
1984	73.589
1985	73.775
1986	73.991
1987	74.417
1988	74.207
1989	74.753
1990	75.34
1991	74.918
1992	75.492
1993	75.32
1994	75.355
1995	75.414
1996	76.268
1997	76.305
1998	76.246
1999	76.272
2000	76.203
2001	77.033
2002	76.97
2003	77.156
2004	77.736
2005	78.33
2006	79.278
2007	79.734
2008	79.94
2009	80.232
2010	80.492
2011	80.538
2012	80.679
2013	81.243
2014	81.415
2015	81.661
2016	82.064
2017	82.312
2018	82.462
2019	82.646
2020	80.679
2021	80.937
2022	83.101