Year	years
1960	54.769
1961	55.243
1962	55.229
1963	54.438
1964	56.156
1965	57.032
1966	57.069
1967	58.047
1968	59.016
1969	59.234
1970	59.895
1971	59.995
1972	59.11
1973	60.696
1974	62.261
1975	63.446
1976	63.149
1977	64.501
1978	65.021
1979	65.263
1980	65.885
1981	66.969
1982	67.152
1983	66.624
1984	66.926
1985	67.998
1986	68.742
1987	69.76
1988	69.467
1989	69.244
1990	69.269
1991	70.376
1992	71.171
1993	71.171
1994	71.52
1995	71.429
1996	71.641
1997	72.335
1998	72.611
1999	72.93
2000	73.714
2001	73.6
2002	74.252
2003	74.306
2004	74.479
2005	74.912
2006	75.512
2007	75.043
2008	75.674
2009	75.941
2010	75.734
2011	76.451
2012	76.379
2013	76.579
2014	76.736
2015	77.035
2016	77.496
2017	78.015
2018	77.684
2019	77.894
2020	76.745
2021	76.472
2022	77.156