Year	years
1960	49.042
1961	49.452
1962	49.794
1963	50.133
1964	49.849
1965	50.563
1966	50.679
1967	50.802
1968	50.856
1969	51.147
1970	51.493
1971	52.023
1972	52.629
1973	53.3
1974	53.87
1975	54.239
1976	54.604
1977	54.709
1978	54.61
1979	54.439
1980	54.143
1981	54.047
1982	53.859
1983	53.389
1984	52.755
1985	51.902
1986	51.061
1987	50.328
1988	49.527
1989	48.696
1990	47.926
1991	47.097
1992	46.512
1993	46.209
1994	45.854
1995	45.553
1996	45.233
1997	44.945
1998	44.701
1999	44.659
2000	45.231
2001	46.019
2002	46.979
2003	48.284
2004	49.487
2005	50.659
2006	51.795
2007	52.739
2008	53.945
2009	55.3
2010	56.799
2011	57.771
2012	58.867
2013	59.878
2014	60.699
2015	61.208
2016	61.794
2017	62.12
2018	62.342
2019	62.793
2020	62.38
2021	61.223
2022	61.803