2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $50,000,000 $100,000,000 $150,000,000 $200,000,000 $250,000,000 $300,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $149,135,173 | 28,161,632 | 28,161,632 |
| 2006 | $165,026,428 | 31,477,611 | 31,477,611 |
| 2007 | $172,336,371 | 74,208,770 | 74,208,770 |
| 2008 | $227,034,578 | 30,774,048 | 30,774,048 |
| 2009 | $179,518,924 | 32,107,433 | 32,107,433 |
| 2010 | $238,462,494 | 40,939,094 | 40,939,094 |
| 2011 | $266,557,827 | 44,815,438 | 44,815,438 |
Note: Quantity represents Weight in kilograms
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