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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $611,038,361 | 0 | 13,090,983,913 |
| 2006 | $767,456,488 | 0 | 17,071,432,353 |
| 2007 | $883,253,134 | 26,024,778 | 19,393,091,800 |
| 2008 | $969,073,000 | 0 | 20,643,622,780 |
| 2009 | $819,705,409 | 18,526,302 | 32,246,631,432 |
| 2010 | $1,252,711,698 | 0 | 45,493,196,158 |
| 2011 | $1,393,092,276 | 0 | 53,786,244,460 |
Note: Quantity represents Number of items
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