2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $5,000,000 $10,000,000 $15,000,000 $20,000,000 $25,000,000 $30,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $17,612,885 | 519,936 | 519,936 |
| 2006 | $20,623,665 | 608,815 | 608,815 |
| 2007 | $23,040,393 | 793,029 | 793,029 |
| 2008 | $22,393,490 | 673,164 | 673,164 |
| 2009 | $22,725,041 | 618,466 | 618,466 |
| 2010 | $26,996,259 | 797,850 | 797,850 |
| 2011 | $25,174,455 | 741,381 | 741,381 |
Note: Quantity represents Weight in kilograms
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