Commodity2005200620072008200920102011
Producer gas/water gas generators, with/without their purifiers; acetylene ...$4,000$3,658  $5,172$3,269 
Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... $12,152$7,067$8,878  $20,651
Total$4,000$15,810$7,067$8,878$5,172$3,269$20,651