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
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $16,788,438 | 40,288,477 | 40,288,477 |
| 2006 | $20,749,150 | 44,386,038 | 44,386,038 |
| 2007 | $16,040,101 | 38,634,154 | 38,634,154 |
| 2008 | $9,198,706 | 32,797,202 | 32,797,202 |
| 2009 | $7,391,790 | 25,154,436 | 25,154,436 |
| 2010 | $9,674,740 | 35,873,375 | 35,873,375 |
| 2011 | $11,274,826 | 30,825,870 | 30,825,870 |
Note: Quantity represents Weight in kilograms
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