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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $3,476,000 | 271,447 | 304,565 |
| 2006 | $2,144,000 | 167,429 | 187,856 |
| 2007 | $931,000 | 62,641 | 80,226 |
| 2008 | $793,000 | 53,926 | 58,363 |
| 2009 | $457,000 | 28,377 | 46,663 |
| 2010 | $4,929,000 | 272,779 | 604,663 |
| 2011 | $1,202,000 | 63,668 | 157,716 |
Note: Quantity represents Number of pairs
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