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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $561,165,854 | 9,153,911,821 | 9,153,911,821 |
| 2006 | $436,609,412 | 8,659,254,959 | 8,659,254,959 |
| 2007 | $507,751,320 | 8,810,066,564 | 8,810,066,564 |
| 2008 | $862,257,610 | 8,745,320,572 | 8,745,320,572 |
| 2009 | $566,308,787 | 10,075,191,440 | 10,075,191,440 |
| 2010 | $952,055,252 | 11,745,183,117 | 11,745,183,117 |
| 2011 | $1,462,720,253 | 12,578,557,695 | 12,578,557,695 |
Note: Quantity represents Weight in kilograms
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