2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $10,000,000 $20,000,000 $30,000,000 $40,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $18,309,804 | 2,871,954 | 2,871,954 |
| 2006 | $28,747,155 | 5,337,960 | 5,337,960 |
| 2007 | $29,941,032 | 4,178,724 | 4,178,724 |
| 2008 | $33,041,791 | 4,363,830 | 4,363,830 |
| 2009 | $20,964,021 | 3,152,221 | 3,152,221 |
| 2010 | $14,745,211 | 2,674,443 | 2,674,443 |
| 2011 | $14,471,300 | 2,085,518 | 2,085,518 |
Note: Quantity represents Weight in kilograms
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