Year	Number
1960	0
1961	0
1962	0
1963	-15
1964	-218
1965	-560
1966	-972
1967	-1398
1968	-1778
1969	-2212
1970	-2657
1971	-3118
1972	-3579
1973	-4038
1974	-4603
1975	-5174
1976	-5659
1977	-5957
1978	-5879
1979	-5130
1980	-4002
1981	-2864
1982	-2102
1983	-1988
1984	-1976
1985	-1956
1986	-1928
1987	-1901
1988	-1883
1989	-1848
1990	-1792
1991	-1751
1992	-1901
1993	485
1994	485
1995	485
1996	485
1997	485
1998	485
1999	485
2000	485
2001	485
2002	485
2003	485
2004	485
2005	485
2006	485
2007	485
2008	485
2009	485
2010	485
2011	485
2012	485
2013	485
2014	485
2015	485
2016	485
2017	485
2018	485
2019	-1487
2020	-742
2021	-742
2022	-1500
2023	-1500