Table 5.--Usable iron ore produced in the United States, by type of product (Thousand metric tons) -------------------------------------------------------------------------------------------- Year Direct-shipping Concentrates Agglomerates Total ore quantity1/ -------------------------------------------------------------------------------------------- 1950 ------- 71,437 23,177 5,004 99,618 1951 ------- 86,651 26,122 5,602 118,375 1952 ------- 71,487 22,391 5,611 99,489 1953 ------- 83,482 29,630 6,776 119,888 1954 ------- 49,894 23,545 5,944 79,383 1955 ------- 67,817 29,234 7,601 104,652 1956 ------- 60,856 27,782 10,810 99,448 1957 ------- 65,538 29,724 12,589 107,851 1958 ------- 36,824 22,224 9,750 68,796 1959 ------- 30,456 20,291 10,496 61,243 1960 ------- 39,593 33,167 17,451 90,209 1961 ------- 26,340 29,089 17,044 72,474 1962 ------- 22,487 28,916 21,579 72,982 1963 ------- 15,462 31,689 27,628 74,780 1964 ------- 22,074 31,868 32,255 86,197 1965 ------- 19,997 32,857 35,988 88,842 1966 ------- 19,889 30,174 41,531 91,594 1967 ------- 16,458 23,238 45,834 85,530 1968 ------- 9,718 25,598 51,925 87,243 1969 ------- 9,947 23,939 55,859 89,745 1970 ------- 7,091 25,341 58,768 91,200 1971 ------- 5,849 20,210 55,998 82,058 1972 ------- 5,924 14,994 55,727 76,644 1973 ------- 3,797 21,917 63,362 89,076 1974 ------- 2/4,958 18,949 61,801 85,709 1975 ------- 1,812 3/13,696 64,625 80,132 1976 ------- 1,848 3/13,136 66,292 81,277 1977 ------- 2,018 8,886 45,741 56,645 1978 ------- 2,068 8,405 72,420 82,892 1979 ------- 1,471 6,171 79,449 87,091 1980 ------- 1,208 3,732 65,790 70,730 1981 ------- 197 3,078 71,075 74,348 1982 ------- 274 2,164 33,563 36,002 1983 ------- 42 1,218 36,904 38,165 1984 ------- 52 1,153 50,887 52,092 1985 ------- 59 1,751 47,724 49,533 1986 ------- 73 1,618 37,795 39,486 1987 ------- 256 1,481 45,910 47,648 1988 ------- 683 875 55,957 57,515 1989 ------- 1,038 709 57,285 59,032 1990 ------- 787 805 54,816 56,408 -------------------------------------------------------------------------------------------- 1/Data may not add to totals shown because of independent rounding. 2/Byproduct agglomerate included with concentrates in 1974 to avoid disclosing company proprietary data. 3/Byproduct concentrate included with agglomerates in 1975 and 1976 to avoid disclosing company proprietary data.