Year	years
1960	60.809
1961	61.464
1962	62.121
1963	58.151
1964	58.669
1965	63.95
1966	64.47
1967	64.822
1968	65.344
1969	65.551
1970	66.003
1971	66.473
1972	66.861
1973	67.368
1974	44.709
1975	67.781
1976	68.401
1977	68.638
1978	69.209
1979	69.439
1980	69.498
1981	69.573
1982	69.59
1983	70.196
1984	70.151
1985	70.505
1986	70.768
1987	71.037
1988	71.048
1989	71.445
1990	71.722
1991	71.975
1992	72.255
1993	72.627
1994	72.932
1995	73.142
1996	73.509
1997	73.763
1998	74
1999	74.255
2000	74.601
2001	74.977
2002	75.37
2003	75.621
2004	75.815
2005	75.953
2006	76.255
2007	76.656
2008	76.813
2009	77.109
2010	77.362
2011	77.736
2012	78.091
2013	78.409
2014	78.817
2015	79.051
2016	78.945
2017	79.246
2018	79.67
2019	79.508
2020	79.345
2021	79.209
2022	80.068