Table 4.--U.S. exports of manganese ore, ferroalloys, and metal (Gross weight) ------------------------------------------------------------------------------------------------------------------------- Metal, including alloys Year Ore1/ Ferromanganese Silicomanganese and waste and scrap -------------------------- -------------------------- -------------------------- -------------------------- Quantity Value Quantity Value Quantity Value Quantity Value (metric tons) (thousands) (metric tons) (thousands) (metric tons) (thousands) (metric tons) (thousands) ------------------------------------------------------------------------------------------------------------------------- 1969----- 17,446 $1,627 1,596 $483 (2/) (2/) 2,241 $1,410 1970----- 18,410 2,461 19,729 4,356 (2/) (2/) 2,695 2,042 1971----- 50,270 2,683 4,106 1,205 (2/) (2/) 1,091 912 1972----- 22,778 3,137 6,207 1,512 (2/) (2/) 1,364 1,021 1973----- 52,116 4,535 7,778 2,137 (2/) (2/) 4,227 3,189 1974----- 202,382 13,656 6,360 2,204 (2/) (2/) 2,103 2,119 1975----- 185,540 13,886 29,302 10,601 (2/) (2/) 2,954 3,318 1976----- 116,093 7,510 6,159 3,462 (2/) (2/) 4,222 3,434 1977----- 125,418 9,221 5,489 3,391 (2/) (2/) 2,679 3,208 1978----- 181,553 13,123 8,557 4,769 4,338 $1,568 5,568 5,165 1979----- 52,910 5,698 22,992 19,252 4,756 2,627 6,018 7,463 1980----- 47,661 6,328 10,601 7,657 4,756 3,468 11,177 11,460 1981----- 59,025 5,132 13,540 12,477 3,575 2,172 2,289 3,980 1982----- 25,909 2,510 9,354 7,517 2,678 1,532 2,674 3,861 1983----- 17,521 1,972 7,650 5,765 5,830 1,746 5,798 8,531 1984----- 215,553 15,643 6,136 4,397 4,838 2,237 3,703 5,915 1985----- 50,839 4,286 6,284 4,762 2,802 1,359 4,683 7,242 1986----- 38,071 3,278 3,922 2,650 1,818 687 4,668 7,892 1987----- 57,398 4,225 2,586 2,144 632 493 5,239 9,748 1988----- 61,680 5,496 3,123 2,950 6,774 4,975 8,944 16,242 1989----- 51,883 5,014 8,177 7,310 5,314 4,068 5,141 10,632 1990----- 69,945 9,297 7,287 6,565 1,791 1,666 6,144 14,043 ------------------------------------------------------------------------------------------------------------------------- 1/Content for 1989-90 is 20% or more manganese, 5% or more manganese for 1978-88, and 10% or more manganese for 1969-77 (Minerals Yearbooks 1969-90, Foreign Trade). 2/Reportable under ferroalloys, not elsewhere classified (Minerals Yearbook 1977, Foreign Trade). Source: Bureau of the Census, adjusted by the U.S. Bureau of Mines, (Manganese Minerals Yearbooks 1969-90). Table 4.--U.S. exports of manganese ore, ferroalloys, and metal (Gross weight) ------------------------------------------------------------------------------------------------------------------------- Metal, including alloys Year Ore1/ Ferromanganese Silicomanganese and waste and scrap -------------------------- -------------------------- -------------------------- -------------------------- Quantity Value Quantity Value Quantity Value Quantity Value (metric tons) (thousands) (metric tons) (thousands) (metric tons) (thousands) (metric tons) (thousands) ------------------------------------------------------------------------------------------------------------------------- 1969----- 17,446 $1,627 1,596 $483 (2/) (2/) 2,241 $1,410 1970----- 18,410 2,461 19,729 4,356 (2/) (2/) 2,695 2,042 1971----- 50,270 2,683 4,106 1,205 (2/) (2/) 1,091 912 1972----- 22,778 3,137 6,207 1,512 (2/) (2/) 1,364 1,021 1973----- 52,116 4,535 7,778 2,137 (2/) (2/) 4,227 3,189 1974----- 202,382 13,656 6,360 2,204 (2/) (2/) 2,103 2,119 1975----- 185,540 13,886 29,302 10,601 (2/) (2/) 2,954 3,318 1976----- 116,093 7,510 6,159 3,462 (2/) (2/) 4,222 3,434 1977----- 125,418 9,221 5,489 3,391 (2/) (2/) 2,679 3,208 1978----- 181,553 13,123 8,557 4,769 4,338 $1,568 5,568 5,165 1979----- 52,910 5,698 22,992 19,252 4,756 2,627 6,018 7,463 1980----- 47,661 6,328 10,601 7,657 4,756 3,468 11,177 11,460 1981----- 59,025 5,132 13,540 12,477 3,575 2,172 2,289 3,980 1982----- 25,909 2,510 9,354 7,517 2,678 1,532 2,674 3,861 1983----- 17,521 1,972 7,650 5,765 5,830 1,746 5,798 8,531 1984----- 215,553 15,643 6,136 4,397 4,838 2,237 3,703 5,915 1985----- 50,839 4,286 6,284 4,762 2,802 1,359 4,683 7,242 1986----- 38,071 3,278 3,922 2,650 1,818 687 4,668 7,892 1987----- 57,398 4,225 2,586 2,144 632 493 5,239 9,748 1988----- 61,680 5,496 3,123 2,950 6,774 4,975 8,944 16,242 1989----- 51,883 5,014 8,177 7,310 5,314 4,068 5,141 10,632 1990----- 69,945 9,297 7,287 6,565 1,791 1,666 6,144 14,043 ------------------------------------------------------------------------------------------------------------------------- 1/Content for 1989-90 is 20% or more manganese, 5% or more manganese for 1978-88, and 10% or more manganese for 1969-77 (Minerals Yearbooks 1969-90, Foreign Trade). 2/Reportable under ferroalloys, not elsewhere classified (Minerals Yearbook 1977, Foreign Trade). Source: Bureau of the Census, adjusted by the U.S. Bureau of Mines, (Manganese Minerals Yearbooks 1969-90).