Year	years
1960	45.481
1961	46.053
1962	46.698
1963	47.322
1964	48.332
1965	49.432
1966	50.273
1967	51.308
1968	52.31
1969	52.52
1970	52.91
1971	53.435
1972	53.582
1973	54.171
1974	54.533
1975	54.657
1976	55.256
1977	55.654
1978	55.761
1979	56.328
1980	56.787
1981	56.919
1982	57.416
1983	57.597
1984	57.993
1985	58.028
1986	58.477
1987	58.566
1988	58.625
1989	59.115
1990	59.176
1991	59.639
1992	59.823
1993	60.413
1994	60.811
1995	61.142
1996	62.029
1997	62.44
1998	63.123
1999	63.202
2000	63.338
2001	63.748
2002	63.918
2003	64.306
2004	64.368
2005	64.761
2006	64.781
2007	65.301
2008	57.787
2009	66.118
2010	66.215
2011	66.963
2012	67.182
2013	67.873
2014	68.168
2015	68.744
2016	68.838
2017	68.995
2018	69.676
2019	69.799
2020	69.959
2021	69.001
2022	70.478