2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $5,000,000 $10,000,000 $15,000,000 $20,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $7,547,522 | 9,088,218 | 9,088,218 |
| 2006 | $14,300,571 | 13,056,936 | 13,056,936 |
| 2007 | $10,738,183 | 9,715,258 | 9,715,258 |
| 2008 | $8,154,991 | 5,836,297 | 5,836,297 |
| 2009 | $6,723,124 | 4,906,646 | 4,906,646 |
| 2010 | $15,044,200 | 10,113,408 | 10,113,408 |
| 2011 | $9,483,801 | 4,826,462 | 4,826,462 |
Note: Quantity represents Weight in kilograms
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