Year	years
1960	61.485
1961	61.836
1962	62.134
1963	62.44
1964	62.734
1965	63.041
1966	63.323
1967	63.653
1968	63.935
1969	64.273
1970	64.584
1971	64.874
1972	65.193
1973	65.522
1974	65.83
1975	66.134
1976	66.441
1977	66.74
1978	67.05
1979	67.389
1980	67.685
1981	67.989
1982	68.302
1983	68.641
1984	68.997
1985	69.274
1986	69.587
1987	69.929
1988	70.28
1989	70.602
1990	70.917
1991	71.246
1992	71.487
1993	71.817
1994	72.125
1995	72.441
1996	72.76
1997	73.066
1998	71.306
1999	69.418
2000	74.072
2001	74.394
2002	74.676
2003	74.968
2004	75.304
2005	75.616
2006	75.636
2007	76.516
2008	77.392
2009	77.665
2010	77.63
2011	77.74
2012	78.28
2013	78.587
2014	78.88
2015	78.922
2016	78.981
2017	78.783
2018	78.696
2019	79.022
2020	76.567
2021	76.806
2022	79.524