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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $37,249,638 | 2,080,249 | 1,728,521 |
| 2006 | $40,462,232 | 2,854,590 | 1,569,150 |
| 2007 | $38,287,382 | 2,237,986 | 1,354,377 |
| 2008 | $39,954,005 | 1,747,366 | 1,330,750 |
| 2009 | $57,154,475 | 2,301,829 | 1,665,566 |
| 2010 | $86,139,985 | 3,582,278 | 2,646,802 |
| 2011 | $98,833,412 | 3,348,623 | 3,041,288 |
Note: Quantity represents Number of pairs
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