Year	years
1960	44.802
1961	45.382
1962	45.097
1963	46.28
1964	46.857
1965	47.381
1966	47.879
1967	48.505
1968	48.465
1969	49.692
1970	50.311
1971	51.147
1972	51.701
1973	52.666
1974	53.454
1975	54.332
1976	55.165
1977	55.873
1978	55.242
1979	57.489
1980	56.704
1981	52.959
1982	53.965
1983	54.882
1984	58.456
1985	59.021
1986	59.574
1987	59.9
1988	60.453
1989	63.91
1990	62.611
1991	64.537
1992	64.722
1993	65.167
1994	65.346
1995	65.743
1996	65.692
1997	66.031
1998	66.472
1999	66.925
2000	67.337
2001	67.591
2002	68.173
2003	67.61
2004	69.047
2005	69.513
2006	69.847
2007	70.381
2008	70.492
2009	70.543
2010	70.631
2011	71.191
2012	71.641
2013	71.905
2014	72.383
2015	72.67
2016	73.06
2017	73.27
2018	73.519
2019	73.379
2020	72.102
2021	71.246
2022	71.93