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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $3,389,994,253 | 6,752,861,920 | 6,752,861,920 |
| 2006 | $3,499,076,740 | 6,535,221,888 | 6,535,221,888 |
| 2007 | $4,089,857,672 | 6,222,838,114 | 6,222,838,114 |
| 2008 | $3,803,617,812 | 5,622,443,226 | 5,622,443,226 |
| 2009 | $2,585,378,808 | 4,686,342,952 | 4,686,342,952 |
| 2010 | $3,920,593,731 | 5,223,081,080 | 5,223,081,080 |
| 2011 | $4,417,748,686 | 5,742,133,976 | 5,742,133,976 |
Note: Quantity represents Weight in kilograms
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