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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $554,422,000 | 392,749,908 | 392,749,908 |
| 2006 | $546,125,000 | 351,913,500 | 351,913,500 |
| 2007 | $611,954,000 | 307,051,200 | 307,051,200 |
| 2008 | $619,495,000 | 305,685,100 | 305,685,100 |
| 2009 | $589,231,000 | 306,563,306 | 306,563,306 |
| 2010 | $557,111,810 | 276,933,100 | 276,933,100 |
| 2011 | $679,864,159 | 299,701,850 | 299,701,850 |
Note: Quantity represents Weight in kilograms
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