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Download Data (XLS File) |
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| Rocky Mountain (PADD 4) Ending Stocks of Isobutane (Thousand Barrels) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2010 | 159 | 169 | 158 | 142 | 191 | 163 | 157 | 181 | 165 | 161 | 159 | 152 |
| 2011 | 158 | 154 | 185 | 172 | 180 | 193 | 174 | 172 | 139 | 167 | 161 | 156 |
| 2012 | 159 | 160 | 160 | 168 | 170 | 180 | 157 | 128 | 169 | 154 | 194 | 147 |
| 2013 | 170 | 206 | 154 | 191 | 191 | 177 | 170 | 161 | 194 | 196 | 181 | 183 |
| 2014 | 205 | 195 | 257 | 229 | 226 | 230 | 246 | 251 | 272 | 265 | 256 | 274 |
| 2015 | 268 | 266 | 266 | 273 | 233 | 252 | 260 | 269 | 229 | 267 | 307 | 335 |
| 2016 | 288 | 327 | 306 | 271 | 275 | 262 | 239 | 275 | 246 | 248 | 268 | 258 |
| 2017 | 255 | 246 | 242 | 250 | 263 | 246 | 258 | 240 | 262 | 259 | 276 | 275 |
| 2018 | 284 | 280 | 252 | 266 | 249 | 246 | 240 | 252 | 232 | 239 | 264 | 267 |
| 2019 | 296 | 344 | 424 | 264 | 279 | 305 | 285 | 274 | 258 | 284 | 271 | 273 |
| 2020 | 468 | 488 | 496 | 477 | 430 | 409 | 395 | 413 | 415 | 424 | 442 | 436 |
| 2021 | 413 | 433 | 454 | 441 | 419 | 393 | 407 | 408 | 409 | 380 | 444 | 438 |
| 2022 | 478 | 450 | 410 | 446 | 425 | 448 | 437 | 415 | 434 | 438 | 438 | 425 |
| 2023 | 475 | 448 | 432 | 434 | 432 | 453 | 393 | 418 | 420 | 384 | 447 | 454 |
| 2024 | 526 | 452 | 440 | 457 | 436 | 426 | 436 | 453 | 428 | 442 | 446 | 465 |
| 2025 | 484 | 463 | 460 | 429 | 448 | 452 | 440 | 461 | 436 | |||
| - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. |
| Release Date: 11/28/2025 |
| Next Release Date: 12/31/2025 |