<P> Copper mining in the United States has been a major industry since the rise of the northern Michigan copper district in the 1840s . In 2014 the United States produced 1.37 million metric tonnes of copper, worth $9.7 billion, making it the world's fourth largest copper producer, after Chile, China, and Peru . Copper was produced from 27 mines in the US . Top copper producing states in 2014 were (in descending order) Arizona, Utah, New Mexico, Nevada, and Montana . Minor production also came from Idaho, and Missouri . As of 2014, the US had 35 million tonnes of known remaining reserves of copper, the fifth largest known copper reserves in the world, after Chile, Australia, Peru, and Mexico . </P> <P> Copper in the US is used mainly in construction (43%) and electric equipment (19%). In 2014, the nation produced 69% of the copper it used, relying on imports from Chile, Canada, Peru, and Mexico for the remaining 31% . </P>

Where is copper most commonly found in the world
find me the text answering this question