Year	Number
1960	-13204
1961	-20540
1962	-25631
1963	-25565
1964	-19490
1965	-9788
1966	-1943
1967	4652
1968	4722
1969	2984
1970	1156
1971	-4213
1972	-4148
1973	-3860
1974	-4531
1975	-4792
1976	-7034
1977	-11093
1978	-13849
1979	-3474
1980	4634
1981	14235
1982	12606
1983	-14660
1984	-18739
1985	4017
1986	17982
1987	10619
1988	-26673
1989	-46816
1990	-31720
1991	-48085
1992	3454
1993	126168
1994	-2162873
1995	443316
1996	1372202
1997	239690
1998	-84051
1999	-97819
2000	-99860
2001	-91955
2002	-47989
2003	-17399
2004	-18936
2005	-23051
2006	-20195
2007	-17724
2008	-16880
2009	-15121
2010	-8394
2011	-5358
2012	-14824
2013	-15833
2014	-15027
2015	-14477
2016	-2605
2017	-5169
2018	-10794
2019	-11823
2020	-1579
2021	-6112
2022	-8999
2023	-8999