Year	Number
1960	-91717
1961	-42887
1962	-60660
1963	-53714
1964	-8153
1965	-5000
1966	-33889
1967	14027
1968	15466
1969	-24577
1970	7176
1971	-181746
1972	-186013
1973	-21889
1974	139192
1975	62199
1976	-123021
1977	-444735
1978	467928
1979	51939
1980	-461772
1981	227111
1982	159325
1983	-600794
1984	-203499
1985	-127212
1986	14543
1987	30046
1988	-314730
1989	-192976
1990	-506279
1991	-612709
1992	-628674
1993	-502479
1994	-590680
1995	-233547
1996	-615154
1997	-757381
1998	-450588
1999	-558268
2000	-587537
2001	-448828
2002	-491663
2003	-442656
2004	-373469
2005	-496048
2006	-507737
2007	-440541
2008	-607044
2009	-694411
2010	-636169
2011	-882791
2012	-721476
2013	-470470
2014	-480289
2015	34287
2016	-1032245
2017	-544157
2018	-622269
2019	-516267
2020	-148862
2021	-444392
2022	-460191
2023	-454882