Year	years
1960	42.391
1961	42.789
1962	43.421
1963	44.025
1964	44.754
1965	45.597
1966	46.561
1967	47.394
1968	48.024
1969	48.29
1970	48.643
1971	49.123
1972	49.52
1973	49.706
1974	50.092
1975	50.483
1976	50.833
1977	51.093
1978	51.316
1979	51.705
1980	52.081
1981	52.491
1982	52.635
1983	52.937
1984	53.099
1985	53.383
1986	53.435
1987	53.726
1988	53.693
1989	54.16
1990	54.286
1991	54.542
1992	54.823
1993	55.023
1994	55.284
1995	55.559
1996	56.063
1997	56.271
1998	56.705
1999	56.797
2000	57.179
2001	57.314
2002	57.733
2003	57.875
2004	58.311
2005	58.619
2006	59.14
2007	59.578
2008	55.207
2009	60.333
2010	60.573
2011	60.989
2012	61.247
2013	61.899
2014	62.095
2015	62.535
2016	62.683
2017	62.842
2018	63.407
2019	63.572
2020	63.785
2021	62.546
2022	64.18