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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $16,594,999,548 | 232,534,370,312 | 232,534,370,312 |
| 2006 | $17,496,139,231 | 235,817,303,248 | 235,817,303,248 |
| 2007 | $17,190,232,798 | 250,280,288,080 | 250,280,288,080 |
| 2008 | $39,252,642,304 | 261,207,047,006 | 261,207,047,006 |
| 2009 | $30,911,895,128 | 274,182,327,168 | 274,182,327,168 |
| 2010 | $38,493,961,352 | 300,557,198,542 | 300,557,198,542 |
| 2011 | $43,587,261,122 | 252,347,481,052 | 252,347,481,052 |
Note: Quantity represents Weight in kilograms
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