2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $10,000,000 $20,000,000 $30,000,000 $40,000,000 $50,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $16,133,423 | 2,432,494 | 2,432,494 |
| 2006 | $19,835,245 | 2,478,339 | 2,478,339 |
| 2007 | $26,953,115 | 2,656,982 | 2,656,982 |
| 2008 | $38,965,286 | 3,342,129 | 3,342,129 |
| 2009 | $23,557,761 | 2,197,536 | 2,197,536 |
| 2010 | $24,040,712 | 2,364,875 | 2,364,875 |
| 2011 | $28,942,809 | 2,333,020 | 2,333,020 |
Note: Quantity represents Weight in kilograms
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