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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,784,936,836 | 8,325,150,840 | 8,325,150,840 |
| 2006 | $3,758,657,976 | 8,235,508,064 | 8,235,508,064 |
| 2007 | $3,664,373,225 | 7,974,401,024 | 7,974,401,024 |
| 2008 | $5,891,670,951 | 8,214,758,112 | 8,214,758,112 |
| 2009 | $3,132,918,883 | 7,967,172,088 | 7,967,172,088 |
| 2010 | $3,516,277,463 | 6,520,547,952 | 6,520,547,952 |
| 2011 | $5,199,413,377 | 6,714,971,944 | 6,714,971,944 |
Note: Quantity represents Weight in kilograms
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