Table 17.--U.S. copper mine, smelter, refinery capacity, and percent utilization (Thousand metric tons) ---------------------------------------------------------------------------------------------------------- Mine Smelter Refinery Year -------------------------------- -------------------------------- -------------------------------- Percent Percent Percent Production Capacity utilization Production Capacity utilization Production Capacity utilization ---------------------------------------------------------------------------------------------------------- 1970---- 1,560 1,678 93 1,795 1,919 94 2,065 2,431 85 1971---- 1,381 1,724 80 1,550 1,886 82 1,808 2,595 70 1972---- 1,510 1,724 88 1,746 1,927 91 2,083 2,640 79 1973---- 1,558 1,814 86 1,805 1,945 93 2,117 2,640 80 1974---- 1,449 1,658 87 1,678 1,976 85 1,952 2,721 72 1975---- 1,282 1,742 74 1,498 1,976 76 1,617 3,085 52 1976---- 1,457 1,857 78 1,585 2,079 76 1,737 2,930 59 1977---- 1,364 1,879 73 1,479 2,079 71 1,707 2,732 62 1978---- 1,358 1,875 72 1,497 2,105 71 1,869 2,860 65 1979---- 1,447 1,833 79 1,541 2,107 73 2,015 2,917 69 1980---- 1,181 1,877 63 1,258 2,107 60 1,730 2,827 61 1981---- 1,538 1,936 79 1,536 1,927 80 2,027 2,680 76 1982---- 1,147 1,870 61 1,208 1,927 63 1,694 2,703 63 1983---- 1,038 1,687 62 1,131 1,764 64 1,597 2,585 62 1984---- 1,103 1,540 72 1,183 1,787 66 1,504 2,188 69 1985---- 1,105 1,476 75 1,191 1,727 69 1,429 2,076 69 1986---- 1,144 1,514 76 1,196 1,653 72 1,480 2,024 73 1987---- 1,244 1,502 83 1,249 1,679 74 1,542 1,887 82 1988---- 1,417 1,654 86 1,363 1,646 83 1,852 2,204 84 1989---- 1,498 1,778 84 1,480 1,745 85 1,957 2,406 81 1990---- 1,588 1,858 85 1,464 1,790 82 2,017 2,485 81 ---------------------------------------------------------------------------------------------------------- Source: U.S. Bureau of Mines.