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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $892,183 | 159,523 | 206,302 |
| 2006 | $1,400,294 | 250,374 | 312,073 |
| 2007 | $1,584,580 | 271,052 | 323,349 |
| 2008 | $2,203,457 | 290,947 | 473,932 |
| 2009 | $2,231,349 | 221,154 | 559,336 |
| 2010 | $2,560,745 | 280,083 | 402,753 |
| 2011 | $2,722,919 | 395,768 | 353,422 |
Note: Quantity represents Number of pairs
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