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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,420,059,764 | 328,882,165 | 328,882,165 |
| 2006 | $1,500,333,696 | 251,327,266 | 251,327,266 |
| 2007 | $1,717,884,062 | 284,299,741 | 284,299,741 |
| 2008 | $1,600,992,421 | 255,714,466 | 255,714,466 |
| 2009 | $1,230,102,080 | 241,281,075 | 241,281,075 |
| 2010 | $1,983,049,325 | 351,425,123 | 351,425,123 |
| 2011 | $2,279,391,780 | 440,846,869 | 440,846,869 |
Note: Quantity represents Weight in kilograms
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