Year	years
1960	52.264
1961	53.268
1962	54.215
1963	55.044
1964	56.027
1965	56.845
1966	57.253
1967	58.41
1968	59.119
1969	59.743
1970	58.731
1971	60.831
1972	61.556
1973	62.072
1974	62.543
1975	63.065
1976	63.549
1977	63.993
1978	64.404
1979	64.775
1980	65.169
1981	65.601
1982	66.002
1983	66.358
1984	66.699
1985	67.004
1986	67.291
1987	67.579
1988	67.902
1989	68.19
1990	68.46
1991	68.679
1992	68.899
1993	69.098
1994	69.274
1995	69.446
1996	69.613
1997	69.766
1998	69.919
1999	70.109
2000	70.313
2001	70.528
2002	70.724
2003	70.928
2004	71.117
2005	71.264
2006	71.48
2007	71.654
2008	71.818
2009	71.972
2010	72.117
2011	72.26
2012	72.399
2013	72.565
2014	72.796
2015	73.03
2016	73.222
2017	73.46
2018	73.677
2019	73.894
2020	72.987
2021	72.128
2022	72.12