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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $896,825,851 | 12,834,831,665 | 12,834,831,665 |
| 2006 | $863,720,906 | 15,095,786,084 | 15,095,786,084 |
| 2007 | $1,157,861,164 | 19,587,560,728 | 19,587,560,728 |
| 2008 | $1,794,370,590 | 16,598,010,792 | 16,598,010,792 |
| 2009 | $7,160,963,824 | 72,455,772,558 | 72,455,772,558 |
| 2010 | $11,710,504,692 | 98,387,909,322 | 98,387,909,322 |
| 2011 | $13,121,990,504 | 99,506,802,778 | 99,506,802,778 |
Note: Quantity represents Weight in kilograms
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