2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $5,000,000 $10,000,000 $15,000,000 $20,000,000 $25,000,000 $30,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $22,601,318 | 570,549 | 1,080,495 |
| 2006 | $22,601,058 | 497,720 | 1,028,748 |
| 2007 | $25,036,715 | 405,696 | 895,251 |
| 2008 | $22,431,535 | 330,170 | 702,597 |
| 2009 | $14,419,781 | 255,220 | 503,680 |
| 2010 | $13,008,493 | 241,554 | 501,411 |
| 2011 | $15,560,470 | 259,147 | 567,072 |
Note: Quantity represents Number of items
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