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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $281,929,094 | 25,226,033 | 25,226,033 |
| 2006 | $360,270,583 | 29,165,831 | 29,165,831 |
| 2007 | $446,179,715 | 31,085,728 | 31,085,728 |
| 2008 | $493,302,205 | 29,196,867 | 29,196,867 |
| 2009 | $578,026,039 | 32,781,150 | 32,781,150 |
| 2010 | $1,140,901,304 | 62,451,992 | 62,451,992 |
| 2011 | $1,363,835,582 | 66,696,667 | 66,696,667 |
Note: Quantity represents Weight in kilograms
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