Volume of mineral production
| 1983 | 1984 | 1985 | 1986 | 1987 | 1988 | 1989 | 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Copper ('000s of metric tons) | 575.6 | 522.2 | 479.4 | 459.1 | 483 | 422.2 | 450.4 | 426.6 | 376.9 | 441.5 | 403.1 | 353.5 | 307.9 | 313.9 | 314.7 | 291 |
| Cobalt ('000s of metric tons) | 2.4 | 3.5 | 4.4 | 4.3 | 4.5 | 5.1 | 4.9 | 4.6 | 4.6 | 4.7 | 4.1 | 2.5 | 2.9 | 4.7 | 4.1 | 4.9 |
