Year	years
1960	55.837
1961	56.192
1962	56.516
1963	56.898
1964	57.196
1965	57.619
1966	57.672
1967	57.973
1968	58.367
1969	58.599
1970	59.018
1971	59.353
1972	59.803
1973	60.045
1974	60.228
1975	60.337
1976	60.521
1977	60.627
1978	60.713
1979	60.867
1980	61.081
1981	61.291
1982	61.447
1983	61.96
1984	61.956
1985	62.093
1986	62.194
1987	62.569
1988	62.729
1989	62.582
1990	62.352
1991	62.052
1992	61.296
1993	61.286
1994	61.594
1995	62.305
1996	62.622
1997	62.973
1998	63.561
1999	64.189
2000	64.891
2001	65.51
2002	66.239
2003	66.756
2004	67.346
2005	67.562
2006	68.165
2007	68.603
2008	68.811
2009	69.356
2010	69.529
2011	69.984
2012	70.36
2013	70.881
2014	71.116
2015	71.451
2016	72.004
2017	72.248
2018	72.76
2019	73.102
2020	66.868
2021	69.366
2022	73.488