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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $506,805,162 | 519,759,648 | 519,759,648 |
| 2006 | $519,627,754 | 527,827,053 | 527,827,053 |
| 2007 | $608,170,256 | 558,047,090 | 558,047,090 |
| 2008 | $655,701,942 | 544,893,947 | 544,893,947 |
| 2009 | $704,748,640 | 588,705,024 | 588,705,024 |
| 2010 | $814,944,977 | 627,466,786 | 627,466,786 |
| 2011 | $958,271,692 | 602,606,898 | 602,606,898 |
Note: Quantity represents Weight in kilograms
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