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| West Coast (PADD 5) Refinery and Blender Net Input of Isobutane-Isobutylene (Thousand Barrels) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1981 | 156 | 178 | 285 | 212 | 281 | 236 | 243 | 225 | 224 | 319 | 212 | 267 |
| 1982 | 356 | 199 | 302 | 306 | 288 | 342 | 378 | 285 | 353 | 243 | 263 | 243 |
| 1983 | 194 | 235 | 169 | 126 | 91 | 176 | 149 | 135 | 91 | 175 | 148 | 121 |
| 1984 | 128 | 217 | 214 | 273 | 116 | 238 | 199 | 192 | 296 | 199 | 191 | 223 |
| 1985 | 218 | 95 | 106 | 315 | 233 | 299 | 306 | 359 | 290 | 197 | 100 | 182 |
| 1986 | 244 | 239 | 231 | 296 | 392 | 355 | 300 | 240 | 344 | 238 | 84 | 173 |
| 1987 | 130 | 257 | 262 | 297 | 283 | 210 | 285 | 284 | 234 | 173 | 224 | 150 |
| 1988 | 272 | 358 | 323 | 324 | 495 | 450 | 452 | 380 | 377 | 322 | 271 | 360 |
| 1989 | 415 | 260 | 347 | 346 | 297 | 370 | 366 | 330 | 320 | 416 | 329 | 387 |
| 1990 | 455 | 341 | 223 | 238 | 261 | 253 | 378 | 397 | 433 | 507 | 610 | 439 |
| 1991 | 458 | 364 | 381 | 448 | 580 | 531 | 557 | 604 | 561 | 699 | 585 | 551 |
| 1992 | 519 | 620 | 534 | 555 | 552 | 539 | 462 | 628 | 531 | 693 | 631 | 783 |
| 1993 | 521 | 499 | 619 | 697 | 568 | 617 | 629 | 698 | 565 | 581 | 513 | 561 |
| 1994 | 545 | 579 | 532 | 514 | 554 | 625 | 544 | 527 | 558 | 662 | 503 | 657 |
| 1995 | 451 | 374 | 492 | 502 | 601 | 485 | 561 | 459 | 459 | 636 | 476 | 459 |
| 1996 | 458 | 549 | 558 | 458 | 481 | 521 | 518 | 430 | 569 | 623 | 557 | 438 |
| 1997 | 426 | 430 | 500 | 586 | 651 | 588 | 573 | 585 | 512 | 471 | 399 | 453 |
| 1998 | 397 | 313 | 386 | 528 | 404 | 551 | 488 | 454 | 514 | 564 | 506 | 478 |
| 1999 | 528 | 339 | 398 | 361 | 400 | 471 | 412 | 351 | 423 | 470 | 378 | 368 |
| 2000 | 420 | 456 | 431 | 323 | 337 | 372 | 366 | 354 | 389 | 309 | 314 | 324 |
| 2001 | 511 | 403 | 501 | 540 | 446 | 330 | 409 | 378 | 324 | 395 | 451 | 289 |
| 2002 | 361 | 378 | 402 | 388 | 403 | 343 | 365 | 341 | 295 | 350 | 356 | 425 |
| 2003 | 492 | 375 | 378 | 376 | 388 | 300 | 371 | 336 | 357 | 344 | 402 | 428 |
| 2004 | 317 | 276 | 418 | 507 | 529 | 342 | 373 | 456 | 373 | 394 | 424 | 438 |
| 2005 | 422 | 421 | 415 | 413 | 454 | 309 | 304 | 406 | 396 | 426 | 483 | 468 |
| 2006 | 707 | 695 | 799 | 773 | 897 | 786 | 517 | 749 | 542 | 631 | 631 | 701 |
| 2007 | 532 | 778 | 802 | 803 | 783 | 724 | 747 | 665 | 554 | 653 | 689 | 617 |
| 2008 | 594 | 658 | 676 | 462 | 575 | 665 | 558 | 563 | 522 | 590 | 597 | 649 |
| 2009 | 458 | 638 | 675 | 686 | 715 | 547 | 534 | 578 | 659 | 722 | 695 | 680 |
| 2010 | 639 | 500 | 338 | 344 | 454 | 529 | 437 | 476 | 465 | 514 | 419 | 483 |
| 2011 | 535 | 549 | 535 | 585 | 548 | 579 | 477 | 619 | 597 | 539 | 645 | 471 |
| 2012 | 554 | 461 | 556 | 520 | 415 | 563 | 540 | 578 | 845 | 838 | 658 | 669 |
| 2013 | 679 | 682 | ||||||||||
| - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. |
| Release Date: 4/29/2013 |
| Next Release Date: Last Week of May 2013 |