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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $384,015,931 | 583,471,477 | 583,471,477 |
| 2006 | $373,907,368 | 551,264,445 | 551,264,445 |
| 2007 | $271,151,356 | 341,913,506 | 341,913,506 |
| 2008 | $437,537,020 | 772,124,153 | 772,124,153 |
| 2009 | $411,999,502 | 512,367,743 | 512,367,743 |
| 2010 | $545,155,718 | 669,366,179 | 669,366,179 |
| 2011 | $649,551,216 | 751,955,863 | 751,955,863 |
Note: Quantity represents Weight in kilograms
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