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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $881,471,437 | 900,766,962 | 900,766,962 |
| 2006 | $1,119,341,215 | 1,021,503,423 | 1,021,503,423 |
| 2007 | $1,068,624,625 | 1,052,686,499 | 1,052,686,499 |
| 2008 | $1,205,391,540 | 1,042,727,454 | 1,042,727,454 |
| 2009 | $1,210,756,802 | 1,136,298,781 | 1,136,298,781 |
| 2010 | $1,595,315,056 | 1,509,615,649 | 1,509,615,649 |
| 2011 | $2,093,140,942 | 1,493,315,935 | 1,493,315,935 |
Note: Quantity represents Weight in kilograms
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