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| U.S. Refinery and Blender Net Production of Isobutane-Isobutylene (Thousand Barrels) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1981 | 116 | 88 | 81 | 120 | 117 | 114 | 94 | 114 | 24 | 0 | 4 | 32 |
| 1982 | 7 | 6 | 1 | -9 | 2 | -12 | -19 | -22 | -23 | 112 | -29 | 16 |
| 1983 | 18 | 1 | 23 | 20 | 65 | 13 | 93 | -3 | 5 | 51 | 67 | 47 |
| 1984 | -7 | -8 | -27 | -26 | -18 | -18 | -13 | -46 | -25 | 85 | 100 | 57 |
| 1985 | -39 | -52 | -12 | -53 | 15 | -42 | 51 | 2 | -26 | -91 | -2 | 12 |
| 1986 | 336 | 17 | 217 | -174 | 208 | 294 | 221 | 107 | 320 | 35 | 146 | -7 |
| 1987 | 280 | 339 | 274 | 213 | 245 | 370 | 299 | 473 | 484 | 424 | 299 | 227 |
| 1988 | 251 | 225 | 606 | 477 | 562 | 454 | 580 | 406 | 482 | 319 | 269 | 164 |
| 1989 | 447 | 193 | 445 | 508 | 627 | 459 | 495 | 395 | 469 | 451 | 291 | 111 |
| 1990 | 225 | 355 | 319 | 305 | 417 | 255 | 490 | 386 | 547 | 309 | 127 | 287 |
| 1991 | 228 | 136 | 286 | 37 | 194 | 122 | 277 | 310 | 111 | -221 | 61 | 63 |
| 1992 | 144 | 467 | 470 | 490 | 554 | 191 | 294 | 361 | 288 | 408 | 75 | -53 |
| 1993 | 221 | 303 | 382 | 341 | 744 | 474 | 482 | 542 | 312 | 173 | 246 | 333 |
| 1994 | 418 | 281 | 494 | 258 | 247 | 543 | 652 | 824 | 176 | 182 | 220 | 414 |
| 1995 | -111 | 60 | 639 | 600 | 306 | 434 | 800 | 613 | 273 | 571 | 335 | 87 |
| 1996 | 288 | 245 | 514 | 409 | 218 | 807 | 458 | 321 | 646 | 343 | -119 | -72 |
| 1997 | 353 | 128 | 147 | 503 | 593 | 354 | 597 | 372 | 553 | 285 | 99 | 215 |
| 1998 | 348 | 195 | 314 | 842 | 322 | 706 | 626 | 348 | 312 | 243 | -61 | 131 |
| 1999 | 271 | 350 | 18 | 629 | 542 | 390 | 788 | -22 | 214 | 25 | -222 | -40 |
| 2000 | -12 | 54 | 108 | 219 | 285 | 469 | 681 | 332 | 41 | 139 | -138 | -63 |
| 2001 | 202 | 93 | 83 | 76 | 427 | -41 | -34 | 131 | 18 | -385 | -601 | -596 |
| 2002 | -317 | 30 | 159 | -7 | 90 | 153 | 256 | 18 | 167 | -642 | -637 | -162 |
| 2003 | -589 | -113 | -318 | -308 | -605 | 125 | -459 | -432 | 13 | -364 | -211 | -350 |
| 2004 | -509 | -595 | -681 | -272 | -692 | -759 | -775 | -623 | -492 | -749 | -428 | -408 |
| 2005 | -567 | -870 | -1,193 | -905 | -1,322 | -1,264 | -1,012 | -909 | -1,013 | -881 | -322 | -823 |
| 2006 | 10 | -17 | -52 | -160 | 428 | -312 | -102 | 132 | -77 | -29 | -169 | 36 |
| 2007 | 371 | 647 | 447 | 61 | 360 | 80 | 385 | 77 | 123 | 83 | -228 | -289 |
| 2008 | 122 | 161 | 553 | 494 | 346 | 225 | -22 | 138 | 331 | -71 | 45 | 531 |
| 2009 | 405 | 208 | -121 | -71 | -349 | 33 | -330 | 59 | -253 | -68 | 131 | 598 |
| 2010 | 145 | -71 | -228 | 13 | 35 | 53 | -3 | -348 | -267 | -191 | -189 | -227 |
| 2011 | 149 | 524 | 167 | 39 | -40 | -11 | -375 | -155 | -187 | -228 | 72 | -52 |
| 2012 | 86 | 345 | 554 | 498 | -281 | -162 | 78 | -159 | -127 | 418 | -86 | -237 |
| 2013 | 186 | 382 | -254 | 93 | -165 | -52 | -137 | -263 | -348 | -484 | -370 | -640 |
| 2014 | -384 | -121 | -140 | -120 | -37 | -242 | -658 | -168 | -158 | -278 | -312 | -725 |
| 2015 | -366 | -91 | -133 | -194 | -313 | -90 | -296 | -105 | -236 | -299 | 32 | -342 |
| 2016 | -466 | -10 | -26 | -86 | -7 | -102 | -94 | -147 | -243 | -274 | -402 | -388 |
| 2017 | -296 | 136 | 453 | 0 | -200 | -112 | -349 | -144 | -206 | 25 | -677 | -706 |
| 2018 | -646 | -554 | -121 | -393 | -375 | -355 | -557 | -51 | -311 | -498 | -530 | -636 |
| 2019 | -326 | -130 | -314 | -398 | -270 | -317 | -475 | -529 | -421 | -562 | -704 | -1,004 |
| 2020 | -781 | -613 | -184 | -340 | -760 | -467 | -485 | -735 | -752 | -753 | -797 | -1,012 |
| 2021 | -741 | -401 | 110 | -309 | -125 | -79 | -170 | -208 | -396 | -229 | -360 | -339 |
| 2022 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2023 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2024 | -- | -- | -- | -- | -- | -- | -- | -- | -- | |||
| - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. |
| Release Date: 11/29/2024 |
| Next Release Date: 12/31/2024 |