2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $2,000,000 $4,000,000 $6,000,000 $8,000,000 $10,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $6,652,000 | 833,376 | 833,376 |
| 2006 | $7,032,000 | 793,202 | 793,202 |
| 2007 | $7,179,000 | 704,087 | 704,087 |
| 2008 | $8,070,000 | 800,192 | 800,192 |
| 2009 | $5,422,000 | 478,253 | 478,253 |
| 2010 | $5,185,504 | 383,096 | 383,096 |
| 2011 | $6,327,353 | 536,724 | 536,724 |
Note: Quantity represents Weight in kilograms
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