Year	years
1960	58.508
1961	58.819
1962	59.079
1963	59.313
1964	59.543
1965	59.779
1966	60.031
1967	60.319
1968	60.599
1969	60.876
1970	61.152
1971	61.428
1972	61.708
1973	61.997
1974	62.306
1975	62.691
1976	63.178
1977	63.73
1978	64.334
1979	64.974
1980	65.871
1981	66.742
1982	67.577
1983	68.505
1984	69.45
1985	70.216
1986	70.999
1987	71.417
1988	71.934
1989	72.176
1990	72.334
1991	72.466
1992	72.734
1993	73.112
1994	73.595
1995	74.155
1996	74.733
1997	75.453
1998	76.044
1999	76.733
2000	77.051
2001	77.194
2002	77.239
2003	77.251
2004	77.264
2005	77.312
2006	77.414
2007	77.564
2008	77.867
2009	78.241
2010	78.632
2011	79.031
2012	79.374
2013	79.647
2014	79.847
2015	79.99
2016	80.142
2017	80.291
2018	80.474
2019	80.704
2020	79.321
2021	76.975
2022	81.329