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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,072,670,338 | 493,140,884 | 493,140,884 |
| 2006 | $884,739,585 | 444,562,143 | 444,562,143 |
| 2007 | $1,101,014,803 | 472,492,598 | 472,492,598 |
| 2008 | $1,084,226,979 | 450,118,290 | 450,118,290 |
| 2009 | $978,377,264 | 601,284,303 | 601,284,303 |
| 2010 | $1,560,251,766 | 631,438,287 | 631,438,287 |
| 2011 | $2,059,041,653 | 632,739,387 | 632,739,387 |
Note: Quantity represents Weight in kilograms
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