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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,054,099,784 | 71,184,467 | 284,627,419 |
| 2006 | $2,039,836,395 | 70,690,172 | 267,729,754 |
| 2007 | $1,925,230,734 | 60,288,360 | 224,420,229 |
| 2008 | $1,569,334,703 | 41,650,000 | 155,534,005 |
| 2009 | $1,110,729,341 | 78,947,235 | 52,218,907 |
| 2010 | $1,011,137,359 | 68,205,715 | 76,104,871 |
| 2011 | $793,300,067 | 46,599,827 | 48,650,888 |
Note: Quantity represents Number of pairs
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