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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,473,895,146 | 990,955,995 | 990,955,995 |
| 2006 | $1,422,912,680 | 925,129,239 | 925,129,239 |
| 2007 | $1,438,372,417 | 803,886,203 | 803,886,203 |
| 2008 | $1,754,112,821 | 782,868,355 | 782,868,355 |
| 2009 | $2,596,121,060 | 917,699,644 | 917,699,644 |
| 2010 | $2,492,515,038 | 790,912,268 | 790,912,268 |
| 2011 | $3,017,377,289 | 1,073,282,143 | 1,073,282,143 |
Note: Quantity represents Weight in kilograms
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