Year	Number
1960	0
1961	0
1962	0
1963	0
1964	0
1965	0
1966	0
1967	0
1968	0
1969	0
1970	0
1971	0
1972	0
1973	-32
1974	-315
1975	-10299
1976	-11120
1977	-11651
1978	-12335
1979	-13309
1980	-13988
1981	-14782
1982	-16629
1983	-19074
1984	0
1985	192
1986	373
1987	536
1988	32
1989	1228
1990	-400
1991	1978
1992	0
1993	10212
1994	1850
1995	3746
1996	1095
1997	-20703
1998	10500
1999	2478
2000	79780
2001	-778
2002	-16141
2003	26287
2004	25414
2005	38337
2006	35476
2007	31237
2008	1786
2009	86016
2010	12316
2011	5262
2012	-26640
2013	-24608
2014	-21600
2015	-18219
2016	-14788
2017	-11604
2018	-8858
2019	-6271
2020	-4465
2021	-4466
2022	-1000
2023	-1000