Year	years
1960	44.994
1961	45.811
1962	46.411
1963	47.072
1964	47.813
1965	48.65
1966	49.551
1967	50.415
1968	51.301
1969	52.032
1970	52.593
1971	52.96
1972	47.339
1973	53.4
1974	53.531
1975	53.68
1976	53.863
1977	53.392
1978	49.239
1979	44.569
1980	55.074
1981	55.204
1982	55.605
1983	52.144
1984	50.727
1985	50.946
1986	52.582
1987	51.955
1988	55.914
1989	59.128
1990	59.766
1991	60.834
1992	61.173
1993	61.584
1994	62.079
1995	62.579
1996	63.032
1997	63.504
1998	62.661
1999	64.153
2000	64.282
2001	64.284
2002	64.256
2003	64.3
2004	64.498
2005	64.985
2006	65.73
2007	66.54
2008	67.492
2009	68.296
2010	68.854
2011	69.263
2012	69.484
2013	69.612
2014	69.77
2015	70.005
2016	70.344
2017	70.686
2018	70.964
2019	71.066
2020	68.648
2021	70.836
2022	71.613