Table 6.--U.S. refinery production of silver
                                                          (Metric tons)
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                                           Concentrates and ores
                                Year  -------------------------------      Old       New       Total
                                        Domestic   Foreign    Total1/     scrap     scrap  production1/
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                            1970------    1,538       993       2,531     1,743       746       5,021
                            1971------    1,158       978       2,137       935       514       3,586
                            1972------    1,193     1,218       2,411       967       990       4,368
                            1973------    1,135     1,209       2,344     1,075     1,286       4,705
                            1974------    1,007       963       1,970     1,744     1,551       5,265
                            1975------    1,029       840       1,869     1,590     1,571       5,030
                            1976------    1,069       622       1,691     1,562     1,651       4,904
                            1977------    1,142       259       1,401     1,489     1,610       4,499
                            1978------    1,369       322       1,691     1,153     1,281       4,125
                            1979------    1,212       366       1,579     1,236     1,142       3,956
                            1980------    1,125        99       1,224     1,653     2,042       4,918
                            1981------    1,384        78       1,462     1,215     1,392       4,069
                            1982------       NA        NA       1,512       933     1,095       3,540
                            1983------       NA        NA       1,797       915     1,187       3,898
                            1984------       NA        NA       1,845       866     1,309       4,021
                            1985------       NA        NA       1,674       866     1,389       3,928
                            1986------       NA        NA       1,319       762     1,448       3,529
                            1987------       NA        NA       1,415       810     1,316       3,541
                            1988------       NA        NA       1,474       852     1,505       3,832
                            1989------       NA        NA       1,718       735     1,495       3,948
                            1990------       NA        NA       1,611       433     1,185       3,229
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                              NA  Not available.
                              1/Data may not add to totals shown because of independent rounding.