Production history |
Metal | 1998 | 1997 | 1996 | 1995 | 1994 | 1993 | 1992 | 1991 | 1990 | 1989 |
COPPER (lbs) | 11,023,113 | 11,023,113 | 11,023,113 | 10,518,254 | 3,928,637 | 4,404,835 | 9,012,497 | 6,896,059 | 3,467,871 | 59,524 |
LEAD (lbs) | 11,812,368 | 6,258,923 | 13,461,425 | 17,136,531 | 5,674,698 | 8,827,308 | 32,121,351 | 30,414 | 26,103,613 | 2,237,691 |
SILVER (oz) | | | | 1,026,908 | 460,959 | 374,115 | 1,068,599 | 874,440 | 797,345 | 126,280 |
ZINC (lbs) | 101,829,314 | 82,867,355 | 112,023,489 | 116,408,483 | 23,571,825 | 59,489,536 | 123,421,388 | 122,685,044 | 108,566,641 | 15,716,754 |
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