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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $128,933,505 | 174,343,619 | 174,343,619 |
| 2006 | $168,710,342 | 228,696,427 | 228,696,427 |
| 2007 | $264,691,648 | 292,384,438 | 292,384,438 |
| 2008 | $581,654,433 | 361,058,222 | 361,058,222 |
| 2009 | $330,460,091 | 232,714,427 | 232,714,427 |
| 2010 | $243,047,051 | 251,806,552 | 251,806,552 |
Note: Quantity represents Weight in kilograms
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