Year	years
1960	43.241
1961	43.636
1962	44.056
1963	44.448
1964	44.87
1965	45.222
1966	45.573
1967	46.026
1968	46.521
1969	47.016
1970	47.507
1971	47.889
1972	48.337
1973	48.825
1974	49.218
1975	49.527
1976	49.666
1977	49.757
1978	49.813
1979	49.851
1980	49.821
1981	49.727
1982	49.633
1983	49.566
1984	49.545
1985	49.638
1986	49.806
1987	50.209
1988	50.594
1989	51.107
1990	51.701
1991	52.357
1992	53.039
1993	53.906
1994	54.436
1995	54.961
1996	55.522
1997	56.223
1998	56.917
1999	57.372
2000	57.938
2001	58.57
2002	58.892
2003	59.491
2004	60.149
2005	60.57
2006	61.315
2007	61.757
2008	62.142
2009	62.734
2010	62.873
2011	63.494
2012	63.544
2013	63.962
2014	64.255
2015	64.339
2016	64.997
2017	65.094
2018	65.27
2019	65.882
2020	65.182
2021	64.485
2022	65.23