Year	NFL, current US$
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	22911000
1989	-1816000
1990	-2634000
1991	-2511000
1992	-2385000
1993	-2261000
1994	-2261000
1995	-2261000
1996	-2261000
1997	-2261000
1998	-2260000
1999	0
2000	0
2001	0
2002	0
2003	0
2004	0
2005	0
2006	0
2007	0
2008	0
2009	4913000
2010	16050000
2011	9078000
2012	8612000
2013	9270000
2014	7132000
2015	2632000
2016	-4345000
2017	2620000
2018	-938000