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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,083,869,887 | 1,582,747,208 | 1,582,747,208 |
| 2006 | $940,845,722 | 983,211,049 | 983,211,049 |
| 2007 | $1,013,599,110 | 969,832,130 | 969,832,130 |
| 2008 | $1,399,059,315 | 1,351,353,270 | 1,351,353,270 |
| 2009 | $1,303,479,513 | 1,310,527,814 | 1,310,527,814 |
| 2010 | $1,668,553,625 | 1,042,377,057 | 1,042,377,057 |
| 2011 | $1,752,680,060 | 1,212,447,759 | 1,212,447,759 |
Note: Quantity represents Weight in kilograms
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