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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,135,868,396 | 16,537,287,880 | 16,537,287,880 |
| 2006 | $1,340,877,263 | 19,614,966,984 | 19,614,966,984 |
| 2007 | $1,171,862,985 | 14,256,473,568 | 14,256,473,568 |
| 2008 | $2,262,309,703 | 16,855,104,655 | 16,855,104,655 |
| 2009 | $1,155,863,090 | 12,709,058,471 | 12,709,058,471 |
| 2010 | $666,286,866 | 6,845,326,874 | 6,845,326,874 |
| 2011 | $1,081,260,196 | 8,796,520,315 | 8,796,520,315 |
Note: Quantity represents Weight in kilograms
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