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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,421,742,658 | 4,180,625,992 | 4,180,625,992 |
| 2006 | $1,281,800,736 | 4,041,883,928 | 4,041,883,928 |
| 2007 | $1,663,160,882 | 4,160,738,697 | 4,160,738,697 |
| 2008 | $2,363,892,630 | 3,711,049,458 | 3,711,049,458 |
| 2009 | $1,750,450,893 | 3,390,080,032 | 3,390,080,032 |
| 2010 | $1,834,156,316 | 3,455,632,888 | 3,455,632,888 |
| 2011 | $1,812,430,893 | 2,830,780,430 | 2,830,780,430 |
Note: Quantity represents Weight in kilograms
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