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| Gulf Coast (PADD 3) Natural Gas Plant Stocks of Isobutane (Thousand Barrels) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1993 | 310 | 311 | 320 | 421 | 884 | 705 | 1,169 | 1,207 | 792 | 602 | 285 | 315 |
| 1994 | 313 | 315 | 457 | 399 | 452 | 519 | 558 | 723 | 751 | 598 | 555 | 427 |
| 1995 | 540 | 394 | 393 | 379 | 391 | 528 | 514 | 441 | 411 | 350 | 380 | 352 |
| 1996 | 433 | 417 | 414 | 449 | 481 | 532 | 438 | 334 | 265 | 354 | 316 | 364 |
| 1997 | 222 | 221 | 150 | 216 | 210 | 197 | 177 | 160 | 140 | 278 | 323 | 350 |
| 1998 | 412 | 464 | 358 | 368 | 359 | 447 | 407 | 467 | 426 | 387 | 393 | 447 |
| 1999 | 628 | 797 | 685 | 704 | 746 | 693 | 712 | 620 | 472 | 663 | 524 | 415 |
| 2000 | 303 | 272 | 175 | 204 | 211 | 322 | 391 | 422 | 421 | 269 | 144 | 255 |
| 2001 | 271 | 363 | 351 | 428 | 418 | 458 | 464 | 470 | 476 | 439 | 302 | 251 |
| 2002 | 266 | 515 | 487 | 541 | 559 | 557 | 713 | 765 | 827 | 699 | 773 | 448 |
| 2003 | 527 | 332 | 207 | 310 | 405 | 545 | 319 | 300 | 196 | 430 | 400 | 360 |
| 2004 | 268 | 327 | 368 | 325 | 287 | 256 | 338 | 509 | 438 | 253 | 465 | 376 |
| 2005 | 446 | 465 | 303 | 384 | 306 | 326 | 338 | 497 | 460 | 520 | 396 | 326 |
| 2006 | 370 | 436 | 405 | 395 | 433 | 601 | 427 | 426 | 360 | 445 | 417 | 248 |
| 2007 | 398 | 507 | 403 | 401 | 418 | 512 | 459 | 347 | 514 | 767 | 507 | 352 |
| 2008 | 331 | 342 | 341 | 478 | 469 | 643 | 522 | 545 | 382 | 346 | 389 | 297 |
| 2009 | 341 | 518 | 381 | 529 | 482 | 450 | 564 | 547 | 517 | 372 | 445 | 419 |
| 2010 | 406 | 353 | 267 | 571 | 578 | 560 | 659 | 687 | 810 | 840 | 572 | 322 |
| 2011 | 322 | 370 | 270 | 397 | 427 | 280 | 245 | 231 | 207 | 147 | 246 | 369 |
| 2012 | 597 | 547 | 372 | 385 | 428 | 474 | 464 | 503 | 544 | 511 | 531 | 605 |
| 2013 | 540 | 693 | 583 | 589 | 642 | 661 | 614 | 673 | 533 | 630 | 373 | 273 |
| 2014 | 251 | 327 | 371 | 308 | 272 | 270 | 341 | 306 | 382 | 381 | 252 | 354 |
| 2015 | 457 | 516 | 452 | 529 | 391 | 260 | 282 | 268 | 318 | 278 | 146 | 244 |
| 2016 | 353 | 330 | 166 | 190 | 165 | 298 | 312 | 268 | 223 | 278 | 427 | 474 |
| 2017 | 504 | 517 | 471 | 392 | 441 | 476 | 540 | 542 | 461 | 268 | 215 | 251 |
| 2018 | 298 | 74 | 75 | 83 | 96 | 167 | 210 | 202 | 202 | 109 | 40 | 83 |
| 2019 | 85 | 95 | 101 | 246 | 225 | 167 | 95 | 88 | 263 | 240 | 179 | 160 |
| 2020 | 166 | 218 | 196 | 301 | 337 | 311 | 163 | 61 | 94 | 98 | 139 | 174 |
| 2021 | 79 | 70 | 67 | 96 | 75 | 93 | 71 | 83 | 134 | 114 | 84 | 104 |
| 2022 | 94 | 74 | 148 | 191 | 307 | 240 | 293 | 480 | 176 | 260 | 358 | 554 |
| 2023 | 553 | 205 | 182 | 249 | 287 | 305 | 446 | 159 | 294 | 175 | 323 | 184 |
| 2024 | 221 | 180 | 235 | 287 | 223 | 316 | 150 | 48 | 191 | 185 | 148 | 184 |
| 2025 | 175 | 117 | 332 | 345 | 416 | 468 | 342 | 376 | 272 | 248 | ||
| - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. |
| Release Date: 12/31/2025 |
| Next Release Date: 1/30/2026 |