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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals/silver, clad with gold, not further worked than semi-manufactur ... | $2,685,498 | $588,188 | $286,438 | $480,459 | $225,228 | $174,019 | $413,740 |
| Total | $2,685,498 | $588,188 | $286,438 | $480,459 | $225,228 | $174,019 | $413,740 |
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