2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $10,000,000 $20,000,000 $30,000,000 $40,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $30,231,998 | 124,329,144 | 124,329,144 |
| 2006 | $28,055,709 | 83,984,789 | 83,984,789 |
| 2007 | $28,405,457 | 72,570,423 | 72,570,423 |
| 2008 | $35,216,523 | 79,575,979 | 79,575,979 |
| 2009 | $13,961,794 | 63,145,227 | 63,145,227 |
| 2010 | $20,668,386 | 69,475,619 | 69,475,619 |
| 2011 | $29,035,350 | 76,631,605 | 76,631,605 |
Note: Quantity represents Weight in kilograms
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