Year	years
1960	41.164
1961	41.55
1962	41.972
1963	42.198
1964	42.59
1965	42.962
1966	43.357
1967	43.712
1968	44.059
1969	44.557
1970	44.979
1971	45.438
1972	45.872
1973	46.392
1974	46.931
1975	47.227
1976	47.715
1977	48.222
1978	48.758
1979	49.292
1980	49.814
1981	50.299
1982	50.736
1983	51.081
1984	51.694
1985	52.141
1986	52.649
1987	53.138
1988	53.791
1989	54.34
1990	54.959
1991	55.573
1992	56.165
1993	56.805
1994	57.295
1995	57.82
1996	58.339
1997	59.04
1998	59.537
1999	59.975
2000	60.419
2001	60.836
2002	61.212
2003	61.463
2004	61.916
2005	62.252
2006	62.613
2007	62.859
2008	63.206
2009	63.581
2010	63.821
2011	64.163
2012	64.288
2013	64.57
2014	64.737
2015	64.9
2016	65.17
2017	65.228
2018	65.279
2019	65.37
2020	61.559
2021	60.879
2022	62.265