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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $395,221,995 | 2,173,696,968 | 2,173,696,968 |
| 2006 | $457,897,660 | 2,611,458,992 | 2,611,458,992 |
| 2007 | $562,632,529 | 2,330,016,984 | 2,330,016,984 |
| 2008 | $1,030,375,768 | 2,336,333,000 | 2,336,333,000 |
| 2009 | $323,624,383 | 1,015,526,008 | 1,015,526,008 |
| 2010 | $643,128,484 | 1,641,861,016 | 1,641,861,016 |
| 2011 | $814,188,731 | 1,800,518,000 | 1,800,518,000 |
Note: Quantity represents Weight in kilograms
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