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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,595,727 | 174,618 | 307,223 |
| 2006 | $3,727,142 | 196,183 | 248,783 |
| 2007 | $4,009,270 | 208,025 | 254,690 |
| 2008 | $5,589,088 | 262,857 | 348,211 |
| 2009 | $4,281,556 | 181,045 | 250,711 |
| 2010 | $6,229,526 | 222,740 | 296,415 |
| 2011 | $7,045,245 | 276,213 | 363,349 |
Note: Quantity represents Number of pairs
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