Where do they get silver?

From silverinstitute.org:

Top 20 Silver Producing Countries in 2009

(millions of ounces)1.Peru123.92.Mexico104.73.China89.14.Australia52.65.Bolivia42.66.Russia42.27.Chile41.88.United States39.89.Poland39.210.Kazakhstan21.711.Canada19.612.Argentina17.113.Turkey14.014.Sweden8.715.Morocco8.316.Indonesia7.717.India7.318.Guatemala4.219.Iran3.520.South Africa2.6

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