2004 2005 2006 2007 2008 2009 2010 2011 2012 $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 | $6,505,832 | 1,993,219 | 1,993,219 |
| 2006 | $11,152,365 | 3,374,759 | 3,374,759 |
| 2007 | $14,713,763 | 3,757,307 | 3,757,307 |
| 2008 | $20,545,510 | 1,439,904 | 1,439,904 |
| 2009 | $18,510,451 | 1,248,244 | 1,248,244 |
| 2010 | $29,881,749 | 2,051,416 | 2,051,416 |
| 2011 | $31,492,615 | 1,748,979 | 1,748,979 |
Note: Quantity represents Weight in kilograms
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