Year	Number
1960	-1912
1961	-2084
1962	-2085
1963	-2085
1964	-2082
1965	-2065
1966	-2045
1967	-2013
1968	-1992
1969	-1848
1970	-1390
1971	-1447
1972	-1495
1973	-1577
1974	-1679
1975	-1464
1976	-1476
1977	-1503
1978	-1505
1979	-1442
1980	-1316
1981	-1244
1982	-1269
1983	-1329
1984	-1365
1985	-1381
1986	-1401
1987	-1418
1988	-1438
1989	-1447
1990	-1211
1991	-1072
1992	-737
1993	-905
1994	-1001
1995	-1071
1996	-1077
1997	-1013
1998	-878
1999	-621
2000	-773
2001	-556
2002	-240
2003	-182
2004	-118
2005	-88
2006	-78
2007	-27
2008	59
2009	200
2010	438
2011	181
2012	11
2013	0
2014	0
2015	0
2016	0
2017	0
2018	0
2019	0
2020	0
2021	0
2022	0
2023	0