Year	Number
1960	-10130
1961	-6307
1962	-13704
1963	-5762
1964	-5938
1965	-5380
1966	-4175
1967	-2693
1968	-1196
1969	187
1970	69
1971	-2066
1972	0
1973	-2
1974	-1
1975	1
1976	0
1977	0
1978	-2
1979	-1
1980	-1
1981	-15
1982	-11719
1983	-12883
1984	-13254
1985	-13489
1986	-13593
1987	-13636
1988	-13627
1989	-13524
1990	-16174
1991	-35899
1992	-34300
1993	-36691
1994	-21003
1995	-3605
1996	-394
1997	-470
1998	-591
1999	5809
2000	5516
2001	7328
2002	-2858
2003	-2880
2004	-2638
2005	-2250
2006	-1858
2007	-1558
2008	-1454
2009	-1478
2010	-1578
2011	-1690
2012	-1758
2013	-1737
2014	-1597
2015	-1378
2016	-1164
2017	-1018
2018	-1000
2019	-987
2020	-486
2021	-486
2022	-1000
2023	-1000