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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $182,819,000 | 1,338,816,500 | 1,338,816,500 |
| 2006 | $273,939,000 | 1,744,147,600 | 1,744,147,600 |
| 2007 | $454,520,000 | 1,606,009,200 | 1,606,009,200 |
| 2008 | $669,445,000 | 2,194,531,700 | 2,194,531,700 |
| 2009 | $745,404,000 | 3,744,485,800 | 3,744,485,800 |
| 2010 | $790,876,830 | 3,582,014,900 | 3,582,014,900 |
| 2011 | $1,201,529,416 | 3,911,472,068 | 3,911,472,068 |
Note: Quantity represents Weight in kilograms
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