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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals/silver, clad with gold, not further worked than semi-manufactur ... | $3,637,000 | $3,559,000 | $3,045,000 | $2,648,000 | $1,642,000 | $2,121,352 | $1,723,501 |
| Total | $3,637,000 | $3,559,000 | $3,045,000 | $2,648,000 | $1,642,000 | $2,121,352 | $1,723,501 |
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