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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $547,611,648 | 441,400,970 | 441,400,970 |
| 2006 | $581,422,022 | 460,239,572 | 460,239,572 |
| 2007 | $685,069,840 | 505,655,842 | 505,655,842 |
| 2008 | $882,125,918 | 588,307,429 | 588,307,429 |
| 2009 | $671,670,888 | 597,337,181 | 597,337,181 |
| 2010 | $918,452,068 | 677,250,920 | 677,250,920 |
| 2011 | $1,307,282,847 | 727,070,811 | 727,070,811 |
Note: Quantity represents Weight in kilograms
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