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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $356,761,461 | 1,574,033,394 | 111,857,027 |
| 2006 | $407,175,139 | 1,662,105,611 | 111,747,716 |
| 2007 | $371,543,744 | 1,417,602,233 | 99,086,524 |
| 2008 | $344,556,949 | 1,131,012,743 | 79,740,802 |
| 2009 | $236,110,259 | 827,281,303 | 59,343,691 |
| 2010 | $249,502,020 | 791,363,336 | 31,497,450 |
| 2011 | $267,048,989 | 822,565,328 | 58,886,181 |
Note: Quantity represents Area in square metres
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