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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,565,840,442 | 3,464,358,706 | 3,464,358,706 |
| 2006 | $1,709,759,244 | 3,114,506,499 | 3,114,506,499 |
| 2007 | $1,897,539,914 | 3,197,994,773 | 3,197,994,773 |
| 2008 | $2,712,793,996 | 3,201,119,459 | 3,201,119,459 |
| 2009 | $1,424,089,621 | 3,077,187,937 | 3,077,187,937 |
| 2010 | $2,090,502,413 | 2,930,633,833 | 2,930,633,833 |
| 2011 | $2,289,828,829 | 2,575,688,752 | 2,575,688,752 |
Note: Quantity represents Weight in kilograms
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