2004 2005 2006 2007 2008 2009 2010 2011 $0 $20,000,000 $40,000,000 $60,000,000 $80,000,000 $100,000,000 $120,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $27,689,015 | 275,589 | 275,589 |
| 2006 | $34,119,725 | 538,593 | 538,593 |
| 2007 | $38,277,107 | 462,597 | 462,597 |
| 2008 | $101,128,846 | 385,818 | 385,818 |
| 2009 | $81,767,737 | 409,737 | 409,737 |
| 2010 | $105,185,989 | 455,100 | 455,100 |
Note: Quantity represents Weight in kilograms
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