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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $676,558,168 | 41,843,831 | 41,843,831 |
| 2006 | $685,769,985 | 38,928,624 | 38,928,624 |
| 2007 | $560,330,315 | 28,156,078 | 28,156,078 |
| 2008 | $612,502,246 | 32,172,452 | 32,172,452 |
| 2009 | $497,369,526 | 25,499,727 | 25,499,727 |
| 2010 | $761,433,100 | 40,423,751 | 40,423,751 |
| 2011 | $1,032,145,828 | 52,005,113 | 52,005,113 |
Note: Quantity represents Weight in kilograms
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