2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $2,000,000 $4,000,000 $6,000,000 $8,000,000 $10,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $7,996,341 | 696,976 | 696,976 |
| 2006 | $8,393,809 | 716,050 | 716,050 |
| 2007 | $6,342,542 | 570,981 | 570,981 |
| 2008 | $5,221,909 | 475,917 | 475,917 |
| 2009 | $4,490,683 | 403,230 | 403,230 |
| 2010 | $4,857,711 | 447,255 | 447,255 |
| 2011 | $5,522,171 | 379,979 | 379,979 |
Note: Quantity represents Weight in kilograms
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