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
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $11,970,348 | 3,134,448 | 3,134,448 |
| 2006 | $16,884,409 | 5,713,062 | 5,713,062 |
| 2007 | $17,922,438 | 4,913,688 | 4,913,688 |
| 2008 | $18,044,327 | 4,526,105 | 4,526,105 |
| 2009 | $18,991,045 | 9,017,424 | 9,017,424 |
| 2010 | $17,817,059 | 4,440,398 | 4,440,398 |
| 2011 | $26,860,315 | 6,798,071 | 6,798,071 |
Note: Quantity represents Weight in kilograms
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