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 | $6,898,570 | 8,922,310 | 8,922,310 |
| 2006 | $14,257,039 | 18,439,434 | 18,439,434 |
| 2007 | $24,316,397 | 34,650,040 | 34,650,040 |
| 2008 | $25,638,680 | 28,558,632 | 28,558,632 |
| 2009 | $24,096,324 | 34,693,027 | 34,693,027 |
| 2010 | $27,602,299 | 35,828,440 | 35,828,440 |
| 2011 | $30,038,256 | 40,746,278 | 40,746,278 |
Note: Quantity represents Weight in kilograms
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