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
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $9,546,734 | 1,273,733 | 0 |
| 2006 | $23,011,548 | 2,171,758 | 227 |
| 2007 | $25,007,236 | 1,851,941 | 189 |
| 2008 | $20,005,749 | 2,972,689 | 198 |
| 2009 | $34,335,371 | 2,338,666 | 177 |
| 2010 | $38,461,035 | 4,256,008 | 229 |
| 2011 | $48,127,999 | 2,647,541 | 242 |
Note: Quantity represents No Quantity
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