Year	years
1960	64.242
1961	64.303
1962	63.602
1963	65.4
1964	66.09
1965	65.978
1966	67.004
1967	65.514
1968	65.515
1969	64.495
1970	65.219
1971	66.27
1972	66.28
1973	66.83
1974	67.29
1975	67.37
1976	67.45
1977	67.42
1978	67.1
1979	66.68
1980	66.53
1981	66.7
1982	66.8
1983	66.98
1984	66.81
1985	66.78
1986	66.55
1987	66.3
1988	66.51
1989	66.56
1990	66.59
1991	66.56
1992	66.56
1993	66.1
1994	65.9
1995	65.7
1996	65.3
1997	65.2
1998	66.1
1999	67
2000	67.7
2001	67.6
2002	67.4
2003	67.7
2004	68
2005	68.4
2006	68.7
2007	69.2
2008	69.2
2009	69.7
2010	69.8
2011	70.8
2012	70.9
2013	71.6
2014	71.3
2015	71.4
2016	71.6
2017	71.6
2018	71.7
2019	71.9
2020	70.4
2021	69.2
2022	71.5