<P> Between the years of 2001 and 2009, the population increased to 30,000 people from just a small prospector camp because the price of gold rose 235% in the same time . </P> <P> The economy is mainly based on the production of gold from nearby gold mines, many artisanal . </P> <P> Many miners work at the gold mine owned by Corporación Ananea . Under the cachorreo system they work for 30 days without payment . On the 31 st day they are allowed to take with them as much ore as they can carry on their shoulders . Whether the ore contains any gold or not is a matter of luck . Pocketing of nuggets or promising chunks of rich ore is tolerated . Women are banned from the mines, but pallaqueras can be seen working though rock on the mine dumps . </P> <P> The town lacks plumbing and sanitation systems . There is also significant contamination by mercury, due to the mining practices . Local miners refine the ore by grinding and treating it with mercury and pressing the mass through a cloth to filter it . The resulting amalgam is heated, to remove the mercury . </P>

How are the miners who work under the cachorreo system paid
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