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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $183,682,240 | 14,998,182 | 14,539,127 |
| 2006 | $168,162,577 | 13,730,957 | 14,552,522 |
| 2007 | $199,158,473 | 0 | 16,615,244 |
| 2008 | $382,567,885 | 0 | 24,915,672 |
| 2009 | $334,488,271 | 13,433,445 | 31,344,175 |
| 2010 | $354,523,748 | 16,794,418 | 35,014,518 |
Note: Quantity represents Number of pairs
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