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Illinois Natural Gas in Underground Storage (Base Gas) (Million Cubic Feet)
Illinois Natural Gas in Underground Storage (Base Gas) (Million Cubic Feet)
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  1990 571,959 571,959 571,959 571,959 572,425 572,423 572,421 572,421 572,419 572,419 573,776 577,424
  1991 577,418 577,418 577,418 568,227 568,178 568,160 568,158 568,157 568,157 568,158 568,158 568,158
  1992 576,257 576,227 576,227 576,227 576,227 576,227 576,227 576,234 576,234 577,202 577,202 579,715
  1993 620,575 620,856 620,777 621,051 621,543 621,543 621,543 621,543 623,466 624,434 624,483 624,483
  1994 624,627 624,627 624,579 624,777 624,777 624,777 624,777 624,777 624,777 624,777 624,777 625,262
  1995 625,262 625,262 623,587 622,897 653,428 653,428 653,428 653,428 653,428 653,428 653,428 653,428
  1996 653,428 653,428 653,410 653,428 653,386 653,395 653,428 651,468 651,468 651,468 651,468 651,468
  1997 651,468 651,468 651,468 651,467 651,467 651,467 651,466 651,468 651,468 651,404 651,404 651,403
  1998 651,403 651,403 651,403 650,968 649,897 649,967 649,897 649,968 649,968 649,968 649,968 649,968
  1999 667,226 668,662 668,660 668,659 668,650 668,642 668,622 668,605 666,907 666,901 670,098 671,781
  2000 671,781 671,781 675,781 675,781 675,778 675,870 675,870 675,870 675,870 675,729 676,369 669,280
  2001 669,070 668,981 668,481 665,721 668,481 668,481 668,482 668,482 668,482 668,482 668,482 668,482
  2002 668,482 666,632 666,632 666,632 666,632 666,632 666,632 666,632 666,632 666,632 666,632 666,632
  2003 666,839 666,838 670,940 666,338 666,338 666,338 666,338 666,338 666,338 666,338 666,338 666,338
  2004 668,478 668,478 664,585 664,585 664,474 664,474 664,474 664,474 672,320 672,320 672,320 672,320
  2005 672,320 672,664 672,320 672,320 672,320 672,320 672,320 672,320 673,068 673,068 673,068 673,068
  2006 673,068 673,361 673,361 673,261 673,261 673,261 673,261 673,261 674,484 674,484 674,484 674,697
  2007 674,697 674,697 678,329 678,329 678,329 678,329 678,329 678,329 678,329 678,329 678,329 679,607
  2008 679,535 679,535 679,653 679,653 679,653 680,168 680,168 680,168 680,586 680,586 681,443 681,672
  2009 684,069 687,205 687,298 686,964 687,298 691,226 687,769 687,202 687,635 688,235 688,275 688,510
  2010 689,076 688,550 688,631 688,879 689,068 689,709 689,709 689,709 690,137 690,920 689,937 691,023
  2011 691,023 691,023 690,651 690,295 691,011 691,495 691,495 691,495 691,907 694,889 694,889 695,103
  2012 696,088 696,088 696,169 695,715 695,185 696,593 696,593 696,593 696,969 696,969 698,358 697,218
  2013 698,574 698,574

- = No Data Reported;  -- = Not Applicable;  NA = Not Available;  W = Withheld to avoid disclosure of individual company data.
Release Date: 4/30/2013
Next Release Date: 5/31/2013

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