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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $602,907,179 | 1,284,325,870 | 1,284,325,870 |
| 2006 | $1,084,694,473 | 2,226,623,863 | 2,226,623,863 |
| 2007 | $980,783,765 | 1,661,552,291 | 1,661,552,291 |
| 2008 | $730,079,480 | 872,982,518 | 872,982,518 |
| 2009 | $232,251,991 | 375,321,253 | 375,321,253 |
| 2010 | $249,441,018 | 449,449,209 | 449,449,209 |
| 2011 | $393,294,686 | 572,536,651 | 572,536,651 |
Note: Quantity represents Weight in kilograms
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