2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $50,000 $100,000 $150,000 $200,000 $250,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $169,095 | 16,017 | 16,601 |
| 2006 | $121,770 | 3,136 | 6,664 |
| 2007 | $172,237 | 3,681 | 9,098 |
| 2008 | $192,573 | 5,767 | 12,891 |
| 2009 | $105,566 | 3,340 | 5,364 |
| 2010 | $95,257 | 2,242 | 4,073 |
| 2011 | $138,712 | 3,361 | 5,652 |
Note: Quantity represents Number of items
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