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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $806,764,787 | 1,676,300,000 | 1,676,300,000 |
| 2006 | $1,041,255,023 | 1,871,000,000 | 1,871,000,000 |
| 2007 | $1,295,212,954 | 1,991,000,000 | 1,991,000,000 |
| 2008 | $1,514,322,659 | 1,905,100,000 | 1,905,100,000 |
| 2009 | $1,287,214,812 | 2,199,000,000 | 2,199,000,000 |
| 2010 | $1,806,153,683 | 2,335,200,000 | 2,335,200,000 |
| 2011 | $2,066,490,866 | 2,817,770,466 | 2,817,770,466 |
Note: Quantity represents Weight in kilograms
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