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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $628,477,462 | 955,510,759 | 955,510,759 |
| 2006 | $837,948,425 | 1,173,576,289 | 1,173,576,289 |
| 2007 | $822,311,210 | 926,711,256 | 926,711,256 |
| 2008 | $879,594,620 | 849,090,147 | 849,090,147 |
| 2009 | $721,023,368 | 650,327,114 | 650,327,114 |
| 2010 | $901,717,161 | 1,054,526,744 | 1,054,526,744 |
Note: Quantity represents Weight in kilograms
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