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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Base metals/silver/gold, clad with platinum, not further worked than semi-m ... | $1,543,462 | $2,585,704 | $3,676,608 | $3,583,915 | $2,676,652 | $5,128,734 | $6,221,103 |
| Total | $1,543,462 | $2,585,704 | $3,676,608 | $3,583,915 | $2,676,652 | $5,128,734 | $6,221,103 |
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