Year	Number
1960	-83533
1961	-79670
1962	-109851
1963	-101617
1964	-49265
1965	-37476
1966	-26859
1967	11978
1968	22619
1969	-39578
1970	-19463
1971	-159715
1972	-223350
1973	-80909
1974	27577
1975	-85640
1976	-267102
1977	-667088
1978	327371
1979	-611896
1980	-2375499
1981	-2096631
1982	-674980
1983	-483862
1984	-152548
1985	-615495
1986	-779175
1987	-792464
1988	-815407
1989	-629064
1990	-1673421
1991	-690497
1992	1101436
1993	816012
1994	119311
1995	-159930
1996	-617944
1997	-850449
1998	-531909
1999	-575014
2000	-1651682
2001	-802955
2002	646391
2003	-266275
2004	-832272
2005	-342704
2006	-695753
2007	-1558277
2008	-609343
2009	-937537
2010	-1201553
2011	-774337
2012	-927382
2013	-625153
2014	-34392
2015	-589781
2016	370860
2017	50447
2018	-243350
2019	-472979
2020	60641
2021	-537784
2022	-518316
2023	-520272