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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $7,103,925 | 141,806 | 1,103,101 |
| 2006 | $4,990,722 | 99,623 | 740,748 |
| 2007 | $3,218,732 | 57,178 | 332,756 |
| 2008 | $5,747,783 | 73,370 | 217,258 |
| 2009 | $7,657,351 | 347,826 | 105,013 |
| 2010 | $5,547,321 | 327,811 | 393,668 |
| 2011 | $9,504,002 | 281,698 | 410,828 |
Note: Quantity represents Number of pairs
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