Year	years
1960	34.615
1961	42.148
1962	53.04
1963	53.608
1964	54.337
1965	55.135
1966	55.786
1967	56.466
1968	57.123
1969	57.774
1970	58.617
1971	59.487
1972	60.367
1973	61.382
1974	62.282
1975	63.084
1976	63.97
1977	64.747
1978	65.463
1979	66.133
1980	66.719
1981	67.305
1982	67.807
1983	68.287
1984	68.687
1985	69.06
1986	69.411
1987	69.795
1988	70.094
1989	70.331
1990	70.424
1991	70.333
1992	70.965
1993	71.548
1994	71.736
1995	72.308
1996	72.503
1997	72.915
1998	73.587
1999	73.582
2000	74.189
2001	75.258
2002	75.64
2003	76.044
2004	76.433
2005	76.819
2006	77.167
2007	77.492
2008	77.562
2009	78.066
2010	78.326
2011	78.644
2012	78.983
2013	79.223
2014	79.499
2015	79.772
2016	80.053
2017	80.321
2018	80.637
2019	80.816
2020	81.058
2021	81.155
2022	81.343