Year	years
1960	61.678
1961	62.474
1962	62.984
1963	63.535
1964	64.35
1965	65.36
1966	65.654
1967	66.243
1968	66.689
1969	66.871
1970	67.188
1971	67.79
1972	67.69
1973	68.5
1974	69.11
1975	70.05
1976	69.55
1977	70.12
1978	70.57
1979	70.59
1980	71.59
1981	72.31
1982	72.58
1983	72.34
1984	73.19
1985	73.8
1986	74.06
1987	74.21
1988	74.42
1989	74.18
1990	74.6
1991	75.19
1992	74.81
1993	75.26
1994	75.69
1995	76.03
1996	76.73
1997	77.2
1998	77.38
1999	77.68
2000	78
2001	78.39
2002	78.54
2003	78.48
2004	78.97
2005	78.77
2006	79.38
2007	79.44
2008	79.36
2009	79.78
2010	80.06
2011	80.29
2012	80.66
2013	81.08
2014	81.16
2015	81.36
2016	81.27
2017	81.92
2018	82.26
2019	82.39
2020	83.35
2021	83.24
2022	80.7