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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $3,742,459,477 | 504,559,886 | 504,559,886 |
| 2006 | $3,645,964,761 | 490,941,582 | 490,941,582 |
| 2007 | $3,426,731,067 | 453,989,618 | 453,989,618 |
| 2008 | $3,558,485,648 | 424,016,277 | 424,016,277 |
| 2009 | $2,991,774,252 | 341,228,797 | 341,228,797 |
| 2010 | $3,940,955,541 | 436,732,079 | 436,732,079 |
| 2011 | $3,943,152,935 | 399,487,505 | 399,487,505 |
Note: Quantity represents Weight in kilograms
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