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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals clad with silver, not further worked than semi-manufactured | $16,251,974 | $21,585,239 | $20,830,630 | $17,655,384 | $12,451,371 | $21,774,921 | $22,675,216 |
| Total | $16,251,974 | $21,585,239 | $20,830,630 | $17,655,384 | $12,451,371 | $21,774,921 | $22,675,216 |
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