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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,891,449,946 | 8,662,713,960 | 8,662,713,960 |
| 2006 | $2,111,753,941 | 8,368,721,968 | 8,368,721,968 |
| 2007 | $3,461,300,772 | 11,681,154,008 | 11,681,154,008 |
| 2008 | $7,268,362,117 | 24,981,725,998 | 24,981,725,998 |
| 2009 | $4,975,062,475 | 18,526,949,016 | 18,526,949,016 |
| 2010 | $6,166,266,366 | 17,391,525,960 | 17,391,525,960 |
| 2011 | $9,228,821,714 | 21,209,282,904 | 21,209,282,904 |
Note: Quantity represents Weight in kilograms
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