Chile copper output up 8.4% in March
Chile, the world's largest copper producer, accounts for roughly 1/3 of global copper output.
Improved ore grades and "smoother operations at deposits that hit trouble in 2012" were quoted by INE as the drivers of the output increase.
Total 2012 Chilean copper production was up 3% over 2011 production.
Sources: Graciela Ibanez of The Wall Street Journal; Reuters; Instituto Nacional de Estadísticas