In January-April 2006, production of polystyrene and styrene copolymers rose by 15% compared with the same period of 2005, to 8,762 mt. In April, production of polystyrene and styrene copolymers fell by 20% compared with April 2005, to 1,694 mt, and by 30% mom. Stirol (STIR: HOLD) is the only producer of polystyrene in Ukraine.