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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals/silver, clad with gold, not further worked than semi-manufactur ... | $5,013,284 | $15,299,887 | $16,827,003 | $15,447,522 | $10,170,066 | $13,790,293 | $17,311,251 |
| Total | $5,013,284 | $15,299,887 | $16,827,003 | $15,447,522 | $10,170,066 | $13,790,293 | $17,311,251 |
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