Year	Number
1960	0
1961	4844
1962	4569
1963	4269
1964	1311
1965	-742
1966	2864
1967	-3434
1968	4506
1969	0
1970	-4508
1971	3042
1972	294
1973	482
1974	-3831
1975	0
1976	700005
1977	0
1978	-694999
1979	-2103
1980	2104
1981	-1799
1982	-12981
1983	-14558
1984	-2785
1985	-1108
1986	33549
1987	607
1988	-1916
1989	-1827
1990	-6595
1991	1159
1992	-970
1993	-5196
1994	-4850
1995	2634
1996	3164
1997	1313
1998	1062
1999	2589
2000	455
2001	-1094
2002	-21543
2003	1674
2004	4974
2005	1224
2006	25126
2007	27944
2008	430
2009	-2700
2010	-40915
2011	2246
2012	124428
2013	733504
2014	301113
2015	-223722
2016	-228173
2017	-230947
2018	-233520
2019	-237572
2020	-115146
2021	-115122
2022	-160237
2023	-177331