2004 2005 2006 2007 2008 2010 2011 $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 | $3,779,494 | 269,923 | 491,673 |
| 2006 | $4,778,442 | 326,770 | 307,631 |
| 2007 | $4,506,383 | 657,175 | 0 |
| 2008 | $4,834,185 | 871,713 | 0 |
| 2010 | $4,534,524 | 747,016 | 0 |
Note: Quantity represents Number of pairs
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