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View History:
Monthly
Annual
Download Data (XLS File)
U.S. Isobutane-Isobutylene Stock Change (Thousand Barrels)
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1981
659
170
-261
453
-143
-131
101
-303
-249
-102
-4
-371
1982
-659
190
-674
-532
388
-74
284
397
611
521
63
-956
1983
-1,094
51
339
975
487
1,705
278
-659
-218
908
-371
-820
1984
-1,021
228
-510
-273
56
765
-418
-235
10
235
-601
25
1985
-414
-952
252
-365
235
39
-264
-245
-423
462
-238
239
1986
-487
51
309
721
6
837
878
845
-115
-376
177
-1,633
1987
-703
-925
-149
213
1,269
-1,236
34
678
1,786
642
73
291
1988
-1,075
-704
-39
376
-262
445
479
426
468
-329
-620
-1,633
1989
-460
312
767
222
450
-583
166
-7
278
-57
-261
-788
1990
-1,297
713
556
377
1,069
614
75
769
636
-133
-526
-1,125
1991
-718
6
-89
-454
206
656
-419
968
-131
-65
-781
-942
1992
2,325
-1,996
441
161
179
-1,059
-287
1,162
1,585
795
17
-577
1993
-194
-160
390
638
1,887
366
401
-719
225
-938
-1,707
-733
1994
-210
453
338
-560
-421
-635
964
1,043
-805
-1,064
-1,297
1995
-87
-593
188
563
660
236
633
220
-922
-334
-1,034
-372
1996
-652
-281
398
555
-112
907
945
491
-518
363
-1,399
-204
1997
-623
-928
-75
903
1,004
546
669
316
317
-650
-756
-261
1998
336
-192
603
-49
176
223
-336
449
-101
-936
-599
-462
1999
-222
196
-96
390
266
1
271
-509
-347
121
-477
-677
2000
-555
-16
-154
191
389
1,091
978
75
-550
-821
-697
-265
2001
-147
83
608
-23
1,270
-26
-372
636
24
-569
-623
-772
2002
-139
1,005
291
711
-20
-389
-141
254
59
-64
-379
-583
2003
-381
-121
-357
201
247
869
-141
95
675
1,078
-1,143
-1,390
2004
-380
-321
1,219
161
-291
-441
687
505
458
-1,897
213
22
2005
272
345
-231
707
237
-707
224
777
-656
587
-188
-887
2006
50
105
873
601
1,220
-704
-979
-75
-203
97
196
-1,401
2007
-11
607
209
788
697
-28
66
-334
545
557
-1,313
-1,301
2008
159
61
697
526
281
-101
-151
633
222
-1,010
-
= No Data Reported;
--
= Not Applicable;
NA
= Not Available;
W
= Withheld to avoid disclosure of individual company data.
Release Date: 12/29/2008
Next Release Date: Last Week of January 2009
Referring Pages:
Isobutane/Isobutylene Supply and Disposition
U.S. Supply and Disposition