Year Sterling (millions) 1975-12-31 14 1976-12-31 15 1977-12-31 30 1978-12-31 16 1979-12-31 12 1980-12-31 22 1981-12-31 34 1982-12-31 24 1983-12-31 13 1984-12-31 77 1985-12-31 135 1986-12-31 30 1987-12-31 25 1988-12-31 51 1989-12-31 45 1990-12-31 80 1991-12-31 13 1992-12-31 0 1993-12-31 0 1994-12-31 0 1995-12-31 0 1996-12-31 0