Year Sterling (millions) 1975-12-31 112 1976-12-31 149 1977-12-31 133 1978-12-31 215 1979-12-31 151 1980-12-31 248 1981-12-31 260 1982-12-31 261 1983-12-31 321 1984-12-31 478 1985-12-31 370 1986-12-31 541