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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,734,000 | 604,348,000 | 604,348,000 |
| 2006 | $4,136,000 | 766,289,000 | 766,289,000 |
| 2007 | $9,193,000 | 1,643,641,500 | 1,643,641,500 |
| 2008 | $9,351,000 | 1,021,751,100 | 1,021,751,100 |
| 2009 | $7,998,000 | 956,855,000 | 956,855,000 |
| 2010 | $7,587,000 | 878,867,400 | 878,867,400 |
| 2011 | $9,046,000 | 857,502,100 | 857,502,100 |
Note: Quantity represents Weight in kilograms
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