Year	years
1960	44.314
1961	45.192
1962	46.122
1963	45.745
1964	46.901
1965	45.79
1966	47.638
1967	47.958
1968	48.131
1969	48.21
1970	40.665
1971	32.225
1972	48.541
1973	48.813
1974	48.084
1975	49.284
1976	49.357
1977	50.134
1978	50.109
1979	50.3
1980	50.81
1981	51.083
1982	51.521
1983	52.019
1984	52.707
1985	53.32
1986	53.64
1987	54.303
1988	54.406
1989	54.022
1990	54.757
1991	53.07
1992	57.049
1993	57.25
1994	58.095
1995	59.005
1996	58.62
1997	61.315
1998	63.947
1999	66.022
2000	66.109
2001	66.66
2002	67.627
2003	68.218
2004	68.534
2005	68.817
2006	68.793
2007	68.213
2008	68.731
2009	68.863
2010	70.312
2011	70.467
2012	71.831
2013	72.54
2014	72.42
2015	72.739
2016	73.325
2017	73.95
2018	74.346
2019	75.09
2020	73.957
2021	74.267
2022	76.012