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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $19,788,000 | 544,520,100 | 544,520,100 |
| 2006 | $23,316,000 | 618,226,500 | 618,226,500 |
| 2007 | $23,573,000 | 526,801,400 | 526,801,400 |
| 2008 | $26,396,000 | 512,597,400 | 512,597,400 |
| 2009 | $26,182,000 | 541,737,400 | 541,737,400 |
| 2010 | $32,006,000 | 704,157,101 | 704,157,101 |
| 2011 | $39,158,000 | 800,737,200 | 800,737,200 |
Note: Quantity represents Weight in kilograms
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