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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $8,012,117,587 | 448,105,010 | 714,871,664 |
| 2006 | $8,591,010,515 | 364,066,230 | 733,836,727 |
| 2007 | $8,280,390,127 | 307,166,799 | 678,049,772 |
| 2008 | $7,609,548,321 | 278,264,092 | 392,156,724 |
| 2009 | $6,008,758,527 | 181,097,057 | 447,176,389 |
| 2010 | $6,826,393,085 | 216,998,901 | 483,734,617 |
| 2011 | $6,598,818,113 | 215,823,695 | 426,982,712 |
Note: Quantity represents Number of pairs
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