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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $546,321,413 | 64,960,929 | 105,360,025 |
| 2006 | $559,335,372 | 44,035,512 | 97,730,496 |
| 2007 | $604,585,561 | 49,576,016 | 91,945,019 |
| 2008 | $556,973,706 | 36,960,575 | 61,035,243 |
| 2009 | $443,397,318 | 25,323,690 | 52,365,310 |
| 2010 | $568,264,910 | 31,698,547 | 67,705,286 |
| 2011 | $813,685,953 | 45,119,467 | 85,337,579 |
Note: Quantity represents Number of pairs
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