Year	Number
1960	-3653
1961	-2893
1962	-2375
1963	-2301
1964	-2301
1965	-2301
1966	-2301
1967	-2301
1968	-2287
1969	-2249
1970	-2226
1971	-2287
1972	-2532
1973	-2951
1974	-3181
1975	-3256
1976	-3312
1977	-3476
1978	-3496
1979	-3498
1980	-5582
1981	-7580
1982	-8959
1983	-9231
1984	-9227
1985	-6141
1986	-2731
1987	-2347
1988	-1148
1989	619
1990	84
1991	-1513
1992	-2266
1993	-2277
1994	-966
1995	3837
1996	-8065
1997	-13699
1998	-7303
1999	-12054
2000	-8533
2001	-8668
2002	-9560
2003	-8855
2004	-9082
2005	-9710
2006	-10071
2007	-10086
2008	-9853
2009	-9028
2010	-8045
2011	-6953
2012	18714
2013	-2551
2014	3883
2015	17051
2016	14833
2017	-6827
2018	-3816
2019	-15787
2020	-4403
2021	-4405
2022	1000
2023	1000