| Year | Utilized production | Imports | Total supply | Exports | ---Consumption--- Total-- Per capita |
-- Million pounds -- Pounds
1970 316.4 51.1 368 11.8 356 1.73
1971 340.4 51.3 392 11.6 380 1.83
1972 321.1 43.2 364 14.5 350 1.67
1973 316.4 38.9 355 20.4 335 1.58
1974 368.0 43.7 412 21.0 391 1.83
1975 370.0 34.6 405 16.4 388 1.80
1976 360.1 21.6 382 20.6 361 1.66
1977 418.8 24.7 444 22.3 421 1.91
1978 477.9 33.7 512 39.2 472 2.12
1979 436.0 31.0 467 39.0 428 1.90
1980 482.1 12.7 495 47.1 448 1.97
1981 537.5 6.7 544 44.4 500 2.17
1982 589.6 4.5 594 44.0 550 2.37
1983 585.4 5.1 591 46.4 544 2.32
1984 748.2 8.8 757 56.3 701 2.96
1985 754.1 9.6 764 51.5 712 2.99
1986 734.8 13.0 748 51.5 696 2.89
1987 780.4 33.2 814 57.1 756 3.12
1988 855.5 39.4 895 78.0 817 3.33
1989 861.6 36.0 898 93.0 805 3.25
1990 864.2 32.2 896 85.7 811 3.24
1991 971.5 31.5 1,003 95.2 908 3.59
1992 980.3 23.8 1,004 102.3 902 3.53
1993 987.6 31.4 1,019 102.1 917 3.55