2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $20,000,000 $40,000,000 $60,000,000 $80,000,000 $100,000,000 $120,000,000 $140,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $51,680,508 | 222,307,000 | 222,307,000 |
| 2006 | $47,744,209 | 189,925,992 | 189,925,992 |
| 2007 | $60,882,105 | 220,912,000 | 220,912,000 |
| 2008 | $85,916,071 | 315,082,000 | 315,082,000 |
| 2009 | $82,231,555 | 332,416,008 | 332,416,008 |
| 2010 | $84,932,033 | 316,040,000 | 316,040,000 |
| 2011 | $118,032,009 | 366,677,992 | 366,677,992 |
Note: Quantity represents Weight in kilograms
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