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 | $33,286,877 | 2,037,938 | 2,037,938 |
| 2006 | $34,377,768 | 2,016,539 | 2,016,539 |
| 2007 | $33,388,867 | 1,755,918 | 1,755,918 |
| 2008 | $36,301,357 | 1,593,938 | 1,593,938 |
| 2009 | $30,709,887 | 1,238,228 | 1,238,228 |
| 2010 | $41,152,745 | 1,629,960 | 1,629,960 |
| 2011 | $48,724,314 | 1,689,006 | 1,689,006 |
Note: Quantity represents Weight in kilograms
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