Year	years
1960	58.163
1961	53.356
1962	59
1963	59.569
1964	60.057
1965	60.629
1966	60.963
1967	61.5
1968	62.192
1969	62.77
1970	63.468
1971	64.204
1972	64.453
1973	64.622
1974	65.03
1975	65.942
1976	66.268
1977	66.518
1978	66.885
1979	67.399
1980	67.756
1981	68.068
1982	67.955
1983	68.14
1984	68.64
1985	69.462
1986	69.704
1987	70.198
1988	70.781
1989	70.724
1990	70.744
1991	70.248
1992	69.979
1993	69.988
1994	70.316
1995	69.887
1996	69.806
1997	69.212
1998	68.599
1999	68.773
2000	68.564
2001	68.357
2002	68.752
2003	68.909
2004	69.227
2005	69.376
2006	70.093
2007	70.655
2008	71.151
2009	71.819
2010	72.272
2011	72.651
2012	73.245
2013	73.666
2014	73.311
2015	73.187
2016	73.399
2017	73.562
2018	73.703
2019	73.931
2020	72.854
2021	70.47
2022	70.962