Year	Number
1960	2606
1961	6109
1962	7016
1963	6681
1964	7079
1965	10695
1966	3563
1967	6824
1968	3333
1969	2029
1970	4458
1971	-12801
1972	-4050
1973	-3030
1974	-20009
1975	-44418
1976	-85430
1977	-83115
1978	-117186
1979	-481199
1980	-1205401
1981	-2127145
1982	-586943
1983	-192869
1984	322022
1985	-210572
1986	-427073
1987	-402606
1988	-89837
1989	2683
1990	-666001
1991	39926
1992	1834556
1993	1171818
1994	665410
1995	71824
1996	27194
1997	6129
1998	35740
1999	85758
2000	-1007135
2001	-192286
2002	1327074
2003	388632
2004	-248616
2005	252185
2006	62684
2007	-942887
2008	221000
2009	-58881
2010	-141355
2011	418796
2012	105905
2013	48076
2014	255611
2015	-281739
2016	-90238
2017	-47090
2018	-47205
2019	-8082
2020	166821
2021	-183672
2022	-65846
2023	-65846