Year	years
1960	45.697
1961	46.072
1962	46.434
1963	44.449
1964	46.978
1965	47.343
1966	47.531
1967	48.039
1968	48.393
1969	48.749
1970	49.123
1971	49.519
1972	49.685
1973	49.921
1974	50.066
1975	50.315
1976	50.498
1977	50.734
1978	50.936
1979	51.068
1980	51.116
1981	51.477
1982	51.722
1983	51.985
1984	52.173
1985	52.717
1986	53.185
1987	53.457
1988	53.853
1989	53.98
1990	54.085
1991	54.792
1992	55.163
1993	55.663
1994	55.897
1995	56.93
1996	57.638
1997	57.986
1998	58.691
1999	59.64
2000	60.121
2001	60.268
2002	60.701
2003	61.463
2004	60.246
2005	62.609
2006	63.06
2007	63.419
2008	63.696
2009	64.113
2010	46.251
2011	64.126
2012	64.804
2013	65.211
2014	65.684
2015	65.954
2016	66.235
2017	66.732
2018	66.919
2019	67.329
2020	67.118
2021	66.119
2022	66.695