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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $84,773,562 | 4,245,388 | 6,008,748 |
| 2006 | $69,478,248 | 4,751,580 | 4,312,460 |
| 2007 | $76,486,712 | 5,508,261 | 5,004,609 |
| 2008 | $76,608,224 | 4,255,738 | 4,770,511 |
| 2009 | $57,128,302 | 3,096,503 | 3,532,861 |
| 2010 | $79,178,664 | 3,722,066 | 4,268,611 |
| 2011 | $90,076,718 | 3,917,879 | 5,374,768 |
Note: Quantity represents Number of pairs
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