Year Sterling (millions) 1975-12-31 20 1976-12-31 9 1977-12-31 18 1978-12-31 36 1979-12-31 14 1980-12-31 13 1981-12-31 34 1982-12-31 354 1983-12-31 96 1984-12-31 126 1985-12-31 491 1986-12-31 496 1987-12-31 525 1988-12-31 640 1989-12-31 1156 1990-12-31 269 1991-12-31 161 1992-12-31 106 1993-12-31 123 1994-12-31 226 1995-12-31 96 1996-12-31 407