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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   
Midwest (PADD 2) Isobutane-Isobutylene Ending Stocks (Thousand Barrels)
Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9
  1980's 1,637 2,140 1,961 2,139 1,936 2,040 2,637 2,270 2,403
  1990's 2,479 2,512 2,795 2,476 1,907 2,169 2,005 1,993 1,736 1,615
  2000's 1,779 1,438 1,611 1,658 1,752 1,838 2,287 2,268

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