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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals/silver, clad with gold, not further worked than semi-manufactur ... | $4,226,410 | $9,158,019 | $5,783,003 | $6,498,282 | $3,733,138 | $13,813,324 | $767,924 |
| Total | $4,226,410 | $9,158,019 | $5,783,003 | $6,498,282 | $3,733,138 | $13,813,324 | $767,924 |
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