Commodity2005200620072009
Polystyrene, expansible, in primary forms$584,761$840,900$734,846$1,126
Polystyrene other than expansible, in primary forms$2,282,311$3,379,591$3,705,916$1,382,980
Styrene-acrylonitrile (SAN) copolymers, in primary forms$533$6,512$3,289 
Acrylonitrile-butadiene-styrene (ABS) copolymers, in primary forms  $9,117$2,184
Polymers of styrene, in primary forms (excl. of 3903.11-3903.30)$1,889,646$2,074,624$2,685,976$2,655,534
Total$4,757,251$6,301,627$7,139,144$4,041,824