Year PPG + PNG (NFL, current US$) 1971 0 1972 -1000 1973 -1000 1974 -1000 1975 -1000 1976 -1000 1977 -1000 1978 -1000 1979 -1000 1980 -1000 1981 -1000 1982 -1000 1983 0 1984 0 1985 0 1986 0