Year	years
1960	55.245
1961	55.564
1962	56.016
1963	56.471
1964	56.914
1965	57.385
1966	57.827
1967	58.062
1968	58.344
1969	58.462
1970	58.766
1971	58.961
1972	59.17
1973	59.34
1974	59.474
1975	59.465
1976	59.486
1977	59.456
1978	59.497
1979	59.708
1980	60.783
1981	61.652
1982	62.193
1983	62.677
1984	63.456
1985	64.272
1986	64.897
1987	64.852
1988	64.339
1989	63.573
1990	62.539
1991	60.908
1992	59.28
1993	57.15
1994	55.288
1995	53.203
1996	51.245
1997	50.366
1998	49.311
1999	47.459
2000	46.476
2001	42.487
2002	45.792
2003	43.956
2004	45.49
2005	45.592
2006	46.394
2007	46.336
2008	47.774
2009	49.394
2010	52.24
2011	55.438
2012	57.723
2013	59.533
2014	60.844
2015	61.637
2016	62.416
2017	62.956
2018	63.594
2019	63.661
2020	63.862
2021	62.045
2022	62.094