Year	Number
1960	-2959
1961	2504
1962	3984
1963	2806
1964	-1750
1965	-4593
1966	-25834
1967	-30046
1968	-43814
1969	-58834
1970	-70830
1971	-113627
1972	-111509
1973	-112685
1974	-121442
1975	-125141
1976	-144535
1977	-92212
1978	-92176
1979	-81024
1980	-50167
1981	-54511
1982	-33767
1983	-3126
1984	-5955
1985	-199
1986	-15155
1987	-6046
1988	10280
1989	6079
1990	6995
1991	-63804
1992	-41760
1993	-42612
1994	-11479
1995	-31423
1996	7378
1997	14366
1998	11316
1999	-163
2000	-2815
2001	927
2002	73253
2003	37743
2004	31302
2005	-18144
2006	-28511
2007	-32607
2008	-46339
2009	-55856
2010	-18831
2011	158511
2012	-2118
2013	163449
2014	5961
2015	-79150
2016	4132
2017	-23281
2018	-61050
2019	-59715
2020	4476
2021	-32370
2022	-29998
2023	-29998