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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,237,181,748 | 321,437,681 | 321,437,681 |
| 2006 | $2,813,495,999 | 422,392,124 | 422,392,124 |
| 2007 | $2,996,518,451 | 415,160,800 | 415,160,800 |
| 2008 | $2,385,361,340 | 345,840,657 | 345,840,657 |
| 2009 | $1,631,128,285 | 340,095,572 | 340,095,572 |
| 2010 | $2,300,234,477 | 295,023,813 | 295,023,813 |
| 2011 | $3,199,839,774 | 340,804,815 | 340,804,815 |
Note: Quantity represents Weight in kilograms
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