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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $392,715,000 | 87,575,400 | 87,575,400 |
| 2006 | $465,182,000 | 101,918,300 | 101,918,300 |
| 2007 | $573,567,000 | 112,476,000 | 112,476,000 |
| 2008 | $675,781,000 | 115,350,200 | 115,350,200 |
| 2009 | $671,098,000 | 117,029,400 | 117,029,400 |
| 2010 | $740,066,833 | 133,815,600 | 133,815,600 |
| 2011 | $855,498,692 | 140,510,020 | 140,510,020 |
Note: Quantity represents Weight in kilograms
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