Year	years
1960	52.828
1961	53.961
1962	55.023
1963	55.882
1964	56.56
1965	56.742
1966	56.238
1967	55.442
1968	55.959
1969	57.115
1970	58.035
1971	58.008
1972	57.632
1973	58.085
1974	58.094
1975	58.728
1976	58.898
1977	59.946
1978	60.711
1979	61.424
1980	62.156
1981	63.186
1982	63.825
1983	64.031
1984	64.02
1985	64.136
1986	64.393
1987	64.696
1988	64.73
1989	65.25
1990	65.6
1991	66.2
1992	66.4
1993	66.4
1994	66.5
1995	66.56
1996	66.44
1997	66.6
1998	66.9
1999	67.4
2000	68.2
2001	68.4
2002	68.6
2003	68.8
2004	68.9
2005	69.12
2006	69.12
2007	69.2
2008	69.2
2009	69.38
2010	69.46
2011	69.74
2012	70.4
2013	70.7
2014	70.97
2015	71.08
2016	71.19
2017	71.3
2018	71.27
2019	71.07
2020	70.86
2021	70.29
2022	70.1