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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $806,618,036 | 1,219,284,904 | 1,219,284,904 |
| 2006 | $806,848,313 | 1,239,748,810 | 1,239,748,810 |
| 2007 | $812,043,207 | 1,224,045,963 | 1,224,045,963 |
| 2008 | $913,676,521 | 1,321,919,624 | 1,321,919,624 |
| 2009 | $749,991,847 | 1,252,920,324 | 1,252,920,324 |
| 2010 | $541,386,650 | 1,028,881,079 | 1,028,881,079 |
| 2011 | $581,401,129 | 881,076,883 | 881,076,883 |
Note: Quantity represents Weight in kilograms
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