2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $1,000,000 $2,000,000 $3,000,000 $4,000,000 $5,000,000 $6,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $3,107,980 | 141,296 | 251,028 |
| 2006 | $4,001,830 | 184,266 | 433,084 |
| 2007 | $5,449,949 | 26,900 | 603,875 |
| 2008 | $3,996,909 | 0 | 313,944 |
| 2009 | $3,303,495 | 0 | 319,614 |
| 2010 | $4,696,267 | 218,459 | 602,564 |
| 2011 | $4,749,419 | 171,740 | 0 |
Note: Quantity represents Number of pairs
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