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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,557,760,267 | 3,205,220,154 | 3,205,220,154 |
| 2006 | $1,556,731,715 | 2,814,192,241 | 2,814,192,241 |
| 2007 | $1,739,648,390 | 2,728,711,503 | 2,728,711,503 |
| 2008 | $2,219,407,729 | 2,700,041,193 | 2,700,041,193 |
| 2009 | $1,575,122,988 | 2,956,311,139 | 2,956,311,139 |
| 2010 | $2,272,950,415 | 3,042,241,292 | 3,042,241,292 |
| 2011 | $2,859,196,993 | 3,075,382,484 | 3,075,382,484 |
Note: Quantity represents Weight in kilograms
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