2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $500,000 $1,000,000 $1,500,000 $2,000,000 $2,500,000 $3,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,347,900 | 444,251 | 444,251 |
| 2006 | $2,249,145 | 235,819 | 235,819 |
| 2007 | $1,059,017 | 454,803 | 454,803 |
| 2008 | $1,432,111 | 137,997 | 137,997 |
| 2009 | $868,066 | 114,356 | 114,356 |
| 2010 | $809,264 | 74,903 | 74,903 |
| 2011 | $545,710 | 46,071 | 46,071 |
Note: Quantity represents Weight in kilograms
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