2004 2005 2006 2007 2008 2009 2010 2011 $0 $5,000,000 $10,000,000 $15,000,000 $20,000,000 $25,000,000 $30,000,000 $35,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $6,757,413 | 1,457,209 | 1,457,209 |
| 2006 | $7,345,936 | 1,402,563 | 1,402,563 |
| 2007 | $15,817,115 | 4,182,459 | 4,182,459 |
| 2008 | $17,660,479 | 3,891,908 | 3,891,908 |
| 2009 | $21,737,287 | 5,295,213 | 5,295,213 |
| 2010 | $27,933,748 | 6,594,862 | 6,594,862 |
Note: Quantity represents Weight in kilograms
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