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View History:
Monthly
Annual
Download Data (XLS File)
Gulf Coast (PADD 3) Isobutane-Isobutylene Stock Change (Thousand Barrels)
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1981
501
271
71
346
43
-354
0
-31
-434
415
51
-359
1982
-971
155
-772
-324
868
88
413
171
658
10
-64
-919
1983
-1,231
431
349
693
420
1,528
-260
-255
-449
1,130
-83
-548
1984
-895
136
-459
-239
54
827
-280
-182
-64
280
-568
-39
1985
-475
-855
731
-403
158
185
-184
-157
-305
298
-462
48
1986
-414
172
241
177
203
900
827
1,067
-311
-403
-81
-1,328
1987
-490
-766
-175
523
1,129
-1,436
-232
642
1,599
421
-146
126
1988
-872
-399
41
98
91
522
18
469
-398
29
-505
-1,224
1989
-408
622
871
112
134
-743
-14
-237
255
2
-382
-199
1990
-1,452
1,037
505
272
508
535
-162
927
215
447
-571
-771
1991
-681
61
-524
0
313
472
-497
906
-417
105
-654
-875
1992
2,273
-2,135
224
73
165
-888
-116
1,382
1,040
650
158
-400
1993
29
-201
-71
79
1,927
403
258
-707
26
-572
-1,101
-615
1994
-126
209
-73
-181
-88
118
-1,368
261
1,175
12
-234
-1,205
1995
88
-585
-212
601
590
-49
635
-319
-1,214
-208
-159
-275
1996
-189
-137
448
105
-143
711
751
285
-518
543
-1,105
52
1997
-384
-828
193
426
270
143
792
520
33
-360
-559
-128
1998
697
-604
469
-74
479
-149
-349
-41
-124
-174
-103
-354
1999
-49
118
83
292
124
61
-489
-327
-236
351
-443
-462
2000
-366
-92
-201
86
394
840
594
-25
-315
-687
-485
-341
2001
195
304
444
-151
1,031
-174
-575
705
79
-287
-363
-668
2002
-230
944
90
496
-289
-385
-33
124
100
-66
54
-407
2003
-725
-55
-397
226
513
218
62
72
401
1,109
-1,135
-825
2004
-354
-172
767
136
-449
-447
657
260
-76
-695
125
45
2005
331
253
-271
526
314
-699
168
587
-475
433
141
-746
2006
-44
52
822
372
903
-819
-1,010
-72
-165
293
144
-1,232
2007
357
406
-138
611
433
-63
-297
-217
306
907
-927
-943
2008
52
576
257
534
355
-116
Release Date: 8/26/2008
Next Release Date: Last Week of September 2008
Referring Pages:
Gulf Coast (PADD 3) Supply and Disposition
Isobutane/Isobutylene Supply and Disposition
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