Year	years
1960	45.679
1961	46.292
1962	46.659
1963	47.599
1964	48.202
1965	48.816
1966	49.508
1967	50.135
1968	50.839
1969	51.414
1970	52.127
1971	52.579
1972	53.215
1973	53.869
1974	54.48
1975	55.039
1976	55.569
1977	56.037
1978	56.554
1979	57.003
1980	57.435
1981	57.831
1982	58.109
1983	58.368
1984	58.593
1985	58.866
1986	58.959
1987	59.213
1988	59.336
1989	59.58
1990	59.721
1991	59.908
1992	60.218
1993	60.506
1994	60.756
1995	61.049
1996	61.105
1997	61.377
1998	60.629
1999	61.672
2000	61.72
2001	61.773
2002	61.698
2003	61.797
2004	61.761
2005	61.801
2006	61.917
2007	62.034
2008	62.571
2009	62.788
2010	63.039
2011	63.526
2012	63.733
2013	63.961
2014	64.259
2015	64.701
2016	64.84
2017	65.103
2018	65.182
2019	65.474
2020	65.787
2021	65.351
2022	65.958