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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Polystyrene, expansible, in primary forms | $56,653 | $46,894 | $89,494 | $268,888 | $201,974 | $228,059 |
| Polystyrene other than expansible, in primary forms | $8,689 | $6,661 | $14,527 | $3,111 | $1,860 | $2,825 |
| Styrene-acrylonitrile (SAN) copolymers, in primary forms | | | $1,767 | $1,999 | $1,439 | $285 |
| Polymers of styrene, in primary forms (excl. of 3903.11-3903.30) | | | $7,123 | $2,644 | $1,651 | |
| Total | $65,342 | $53,555 | $112,911 | $276,642 | $206,924 | $231,169 |
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