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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,011,155 | 47,529 | 224,551 |
| 2006 | $1,395,956 | 75,504 | 119,766 |
| 2007 | $2,260,479 | 109,001 | 181,065 |
| 2008 | $2,498,582 | 110,262 | 183,253 |
| 2009 | $1,598,392 | 86,483 | 185,892 |
| 2010 | $1,869,324 | 90,280 | 198,885 |
| 2011 | $2,154,433 | 89,297 | 225,900 |
Note: Quantity represents Number of pairs
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