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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,298,667,308 | 923,660,286 | 923,660,286 |
| 2006 | $1,897,125,278 | 938,565,378 | 938,565,378 |
| 2007 | $1,856,353,225 | 876,789,824 | 876,789,824 |
| 2008 | $2,078,969,749 | 768,796,870 | 768,796,870 |
| 2009 | $1,268,011,957 | 688,105,159 | 688,105,159 |
| 2010 | $2,309,904,959 | 692,355,663 | 692,355,663 |
| 2011 | $4,291,251,367 | 753,862,620 | 753,862,620 |
Note: Quantity represents Weight in kilograms
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