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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals clad with silver, not further worked than semi-manufactured | $427,819 | $1,088,796 | $1,758,163 | $2,273,611 | $419,654 | $1,718,091 | $2,664,572 |
| Total | $427,819 | $1,088,796 | $1,758,163 | $2,273,611 | $419,654 | $1,718,091 | $2,664,572 |
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