Year	Number
1960	14630
1961	-88956
1962	-81266
1963	-78925
1964	-74753
1965	-58643
1966	-80805
1967	-68112
1968	-75201
1969	-90014
1970	-141522
1971	-259338
1972	-237176
1973	-202853
1974	-119887
1975	-37580
1976	-28778
1977	44882
1978	-30232
1979	390042
1980	1599597
1981	979145
1982	383902
1983	-579348
1984	-386269
1985	207729
1986	103168
1987	273869
1988	147670
1989	23958
1990	33746
1991	-92040
1992	-1325884
1993	-237385
1994	-453234
1995	187198
1996	44452
1997	37739
1998	71493
1999	44854
2000	846368
2001	245384
2002	-991254
2003	-688561
2004	-645323
2005	-835290
2006	-720251
2007	-738843
2008	-689315
2009	-435730
2010	-560544
2011	-1041473
2012	-1756658
2013	-2055407
2014	-2155446
2015	-2469015
2016	-2470983
2017	-1787873
2018	-1647753
2019	-1495696
2020	-699442
2021	-682175
2022	-287968
2023	-287206