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