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
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $18,395,833 | 10,182,955 | 10,182,955 |
| 2006 | $16,427,088 | 8,814,688 | 8,814,688 |
| 2007 | $43,518,185 | 11,101,021 | 11,101,021 |
| 2008 | $42,418,489 | 10,272,580 | 10,272,580 |
| 2009 | $37,492,012 | 9,841,084 | 9,841,084 |
| 2010 | $76,484,674 | 29,242,833 | 29,242,833 |
| 2011 | $94,034,639 | 18,207,657 | 18,207,657 |
Note: Quantity represents Weight in kilograms
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