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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $5,555,254,350 | 26,318,784 | 134 |
| 2006 | $9,675,053,941 | 45,836,903 | 182 |
| 2007 | $8,873,029,905 | 0 | 152 |
| 2008 | $8,413,043,806 | 12,656,341 | 160 |
| 2009 | $9,046,602,320 | 18,427,330 | 204 |
| 2010 | $10,393,084,315 | 15,359,048 | 195 |
| 2011 | $11,094,404,442 | 13,523,068 | 211 |
Note: Quantity represents Number of items
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