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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $643,273,075 | 2,945,229,818 | 2,945,229,818 |
| 2006 | $1,067,555,720 | 5,393,207,773 | 5,393,207,773 |
| 2007 | $1,307,229,903 | 4,573,826,504 | 4,573,826,504 |
| 2008 | $2,325,238,324 | 6,067,159,024 | 6,067,159,024 |
| 2009 | $1,355,488,021 | 3,391,334,921 | 3,391,334,921 |
| 2010 | $1,652,655,944 | 4,203,585,645 | 4,203,585,645 |
| 2011 | $2,218,661,290 | 5,515,756,171 | 5,515,756,171 |
Note: Quantity represents Weight in kilograms
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