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Note: These data are available in spreadsheet format by clicking the ''Download Series History'' link on the previous page (with drop-down menu bar at top).
 View History:    Monthly     Annual   
U.S. Isobutane Refinery Net Production (Thousand Barrels)
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  2005 -603 -923 -1,215 -900 -1,222 -1,171 -976 -974 -1,037 -933 -349 -830
  2006 -46 -99 -52 -191 367 -377 -161 72 -124 -90 -175 -50
  2007 -164 381 -49 -594 -21 -80 138 -54 56 -38 -370 -369
  2008 -110 25 522 460

Updated on 6/26/2008
Source: U.S. Energy Information Administration
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