2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $10,000,000 $20,000,000 $30,000,000 $40,000,000 $50,000,000 $60,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $13,639,268 | 7,876,300 | 7,876,300 |
| 2006 | $13,630,435 | 5,885,620 | 5,885,620 |
| 2007 | $13,732,091 | 4,099,945 | 4,099,945 |
| 2008 | $11,657,209 | 3,800,569 | 3,800,569 |
| 2009 | $21,050,543 | 8,592,680 | 8,592,680 |
| 2010 | $50,846,061 | 20,505,802 | 20,505,802 |
| 2011 | $49,285,863 | 23,009,912 | 23,009,912 |
Note: Quantity represents Weight in kilograms
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