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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,175,252,759 | 604,466,800 | 604,466,800 |
| 2006 | $1,353,658,811 | 586,951,300 | 586,951,300 |
| 2007 | $1,633,563,116 | 617,851,700 | 617,851,700 |
| 2008 | $1,971,749,525 | 651,122,600 | 651,122,600 |
| 2009 | $1,634,436,698 | 534,451,700 | 534,451,700 |
| 2010 | $1,920,321,272 | 602,822,300 | 602,822,300 |
| 2011 | $2,217,002,762 | 604,171,000 | 604,171,000 |
Note: Quantity represents Weight in kilograms
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