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 $60,000,000 $70,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $19,349,658 | 41,295,000 | 41,295,000 |
| 2006 | $16,319,704 | 30,176,000 | 30,176,000 |
| 2007 | $14,299,391 | 29,071,000 | 29,071,000 |
| 2008 | $17,077,197 | 28,026,865 | 28,026,865 |
| 2009 | $33,282,638 | 75,121,000 | 75,121,000 |
| 2010 | $61,867,363 | 101,603,000 | 101,603,000 |
| 2011 | $42,314,204 | 68,166,000 | 68,166,000 |
Note: Quantity represents Weight in kilograms
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