Year	years
1960	57.1
1961	57.736
1962	58.431
1963	59.059
1964	59.658
1965	60.234
1966	60.762
1967	61.286
1968	61.825
1969	62.296
1970	62.762
1971	63.217
1972	63.585
1973	63.97
1974	64.245
1975	64.503
1976	64.755
1977	64.927
1978	65.074
1979	65.23
1980	65.421
1981	65.611
1982	65.77
1983	65.93
1984	66.053
1985	66.106
1986	66.061
1987	65.952
1988	65.858
1989	65.671
1990	65.477
1991	65.383
1992	65.242
1993	65.087
1994	65.064
1995	65.183
1996	65.37
1997	65.517
1998	65.718
1999	65.923
2000	65.72
2001	66.138
2002	66.257
2003	66.257
2004	66.076
2005	65.761
2006	65.49
2007	65.29
2008	65.124
2009	65.112
2010	65.119
2011	65.178
2012	65.271
2013	65.36
2014	65.493
2015	65.705
2016	65.906
2017	66.121
2018	66.355
2019	66.608
2020	66.882
2021	67.2
2022	67.092