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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $713,146,844 | 1,973,604,584 | 1,973,604,584 |
| 2006 | $1,008,380,814 | 2,222,185,517 | 2,222,185,517 |
| 2007 | $1,035,893,758 | 1,889,337,471 | 1,889,337,471 |
| 2008 | $1,318,010,563 | 1,913,374,416 | 1,913,374,416 |
| 2009 | $844,717,972 | 1,931,628,107 | 1,931,628,107 |
| 2010 | $751,619,824 | 1,347,382,761 | 1,347,382,761 |
| 2011 | $1,354,053,044 | 1,655,067,935 | 1,655,067,935 |
Note: Quantity represents Weight in kilograms
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