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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $681,140,696 | 2,121,934 | 136 |
| 2006 | $1,166,068,318 | 0 | 153 |
| 2007 | $1,833,254,620 | 0 | 224 |
| 2008 | $1,334,286,797 | 0 | 0 |
| 2009 | $655,579,306 | 0 | 47 |
| 2010 | $885,759,993 | 0 | 71 |
| 2011 | $563,405,314 | 296,194 | 49 |
Note: Quantity represents Number of items
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