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 | $12,802,504 | 16,433,914 | 16,433,914 |
| 2006 | $25,887,176 | 27,437,891 | 27,437,891 |
| 2007 | $3,503,967 | 2,835,490 | 2,835,490 |
| 2008 | $21,528,514 | 16,850,959 | 16,850,959 |
| 2009 | $8,247,068 | 8,607,678 | 8,607,678 |
| 2010 | $17,052,790 | 8,709,900 | 8,709,900 |
| 2011 | $26,242,826 | 17,604,433 | 17,604,433 |
Note: Quantity represents Weight in kilograms
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