Year	Number
1960	-687
1961	-773
1962	-902
1963	-1242
1964	-2521
1965	-4383
1966	-6296
1967	-7778
1968	-8408
1969	-8723
1970	-8937
1971	-9163
1972	-9535
1973	-10751
1974	-15703
1975	-22800
1976	-29796
1977	-34368
1978	-34912
1979	-9989
1980	-210554
1981	-13245
1982	217247
1983	257
1984	-164544
1985	-30747
1986	42086
1987	23220
1988	16077
1989	4925
1990	-58912
1991	112490
1992	6011
1993	-146473
1994	994
1995	152235
1996	1268
1997	3624
1998	2237
1999	17174
2000	-3839
2001	3473
2002	20396
2003	105146
2004	110387
2005	19281
2006	23055
2007	-11340
2008	36443
2009	9108
2010	10419
2011	29255
2012	9516
2013	51887
2014	20842
2015	-48918
2016	21546
2017	16916
2018	46664
2019	-9469
2020	9016
2021	9016
2022	-2000
2023	-2000