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 | $29,719,000 | 7,267,558 | 7,267,558 |
| 2006 | $35,155,000 | 7,976,550 | 7,976,550 |
| 2007 | $105,861,000 | 216,081,000 | 216,081,000 |
| 2008 | $120,267,000 | 229,598,300 | 229,598,300 |
| 2009 | $67,013,000 | 160,387,521 | 160,387,521 |
| 2010 | $84,631,462 | 162,308,265 | 162,308,265 |
| 2011 | $92,831,553 | 107,703,175 | 107,703,175 |
Note: Quantity represents Weight in kilograms
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