That's because copper is used in damn near every manufactured good, not to mention power-transmission (infrastructure/RE development/housing).
Wisconsin native. "The true soldier fights not because he hates what is in front of him, but because he loves what is behind him."--GKC "Liberalism is the modern and morbid habit of always sacrificing the normal to the abnormal" --G K Chesterton "The only objective of Liberty is Life" --G K Chesterton "A man can never have too much red wine, too many books, or too much ammunition." -- Rudyard Kipling