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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $344,455,408 | 4,756,771,503 | 4,756,771,503 |
| 2006 | $345,475,970 | 4,213,652,928 | 4,213,652,928 |
| 2007 | $640,969,861 | 4,299,186,944 | 4,299,186,944 |
| 2008 | $477,208,963 | 4,142,248,072 | 4,142,248,072 |
| 2009 | $224,853,919 | 3,586,387,008 | 3,586,387,008 |
| 2010 | $365,598,118 | 4,516,860,064 | 4,516,860,064 |
| 2011 | $351,697,159 | 3,649,920,000 | 3,649,920,000 |
Note: Quantity represents Weight in kilograms
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