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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $4,382,996 | 122,261 | 9,373,321,773 |
| 2006 | $3,566,630 | 38,659 | 9,024,158,939 |
| 2007 | $6,421,805 | 277,197 | 117,240,628,384 |
| 2008 | $5,978,566 | 71,459 | 1,777,932,000 |
| 2009 | $4,952,731 | 65,636 | 1,496,239,412 |
| 2010 | $5,644,299 | 99,547 | 0 |
| 2011 | $6,549,932 | 113,433 | 942,757,641 |
Note: Quantity represents Number of items
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