Year	years
1960	58.237
1961	59.211
1962	60.083
1963	60.948
1964	61.849
1965	62.535
1966	62.208
1967	61.343
1968	61.51
1969	62.732
1970	64.114
1971	64.119
1972	63.99
1973	64.177
1974	65.371
1975	66.165
1976	67.034
1977	67.769
1978	68.671
1979	69.383
1980	69.66
1981	70.078
1982	70.405
1983	70.703
1984	70.834
1985	71.013
1986	71.318
1987	71.668
1988	72.174
1989	72.835
1990	73.4
1991	73.9
1992	73.9
1993	74
1994	74
1995	74.28
1996	74.4
1997	74.4
1998	74.5
1999	74.7
2000	75.3
2001	75.3
2002	75.5
2003	75.6
2004	75.8
2005	75.91
2006	75.91
2007	76.11
2008	76.11
2009	76.56
2010	76.65
2011	76.97
2012	77.5
2013	77.5
2014	77.58
2015	77.79
2016	77.76
2017	77.89
2018	77.72
2019	77.56
2020	77.66
2021	77.24
2022	77.1