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| Refining District Oklahoma-Kansas-Missouri Refinery and Blender Net Input of Isobutane-Isobutylene (Thousand Barrels) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1981 | 421 | 529 | 619 | 573 | 538 | 568 | 546 | 635 | 609 | 555 | 583 | 496 |
| 1982 | 426 | 508 | 540 | 519 | 414 | 450 | 526 | 472 | 493 | 418 | 385 | 446 |
| 1983 | 401 | 362 | 399 | 326 | 335 | 338 | 357 | 401 | 379 | 370 | 436 | 341 |
| 1984 | 398 | 439 | 452 | 381 | 489 | 422 | 433 | 498 | 426 | 432 | 444 | 450 |
| 1985 | 373 | 352 | 428 | 350 | 403 | 413 | 429 | 471 | 429 | 409 | 372 | 381 |
| 1986 | 399 | 332 | 360 | 201 | 406 | 501 | 531 | 529 | 457 | 406 | 432 | 455 |
| 1987 | 429 | 353 | 418 | 357 | 394 | 373 | 330 | 379 | 377 | 362 | 374 | 446 |
| 1988 | 388 | 393 | 334 | 354 | 434 | 407 | 503 | 515 | 461 | 441 | 451 | 460 |
| 1989 | 396 | 365 | 281 | 391 | 420 | 371 | 388 | 386 | 395 | 366 | 244 | 275 |
| 1990 | 414 | 378 | 301 | 359 | 401 | 404 | 437 | 416 | 356 | 376 | 483 | 495 |
| 1991 | 299 | 283 | 320 | 419 | 442 | 404 | 393 | 413 | 320 | 358 | 320 | 309 |
| 1992 | 292 | 262 | 341 | 235 | 326 | 367 | 333 | 265 | 239 | 149 | 255 | 345 |
| 1993 | 330 | 288 | 369 | 332 | 321 | 260 | 253 | 212 | 198 | 311 | 365 | 386 |
| 1994 | 233 | 287 | 332 | 266 | 288 | 265 | 241 | 279 | 243 | 220 | 256 | 231 |
| 1995 | 238 | 196 | 162 | 112 | 191 | 217 | 362 | 272 | 263 | 209 | 300 | 149 |
| 1996 | 191 | 188 | 262 | 247 | 311 | 314 | 276 | 311 | 327 | 178 | 237 | 172 |
| 1997 | 181 | 111 | 192 | 227 | 153 | 178 | 225 | 231 | 145 | 173 | 147 | 101 |
| 1998 | 119 | 98 | 204 | 254 | 346 | 316 | 355 | 336 | 220 | 276 | 257 | 268 |
| 1999 | 176 | 177 | 195 | 248 | 257 | 323 | 236 | 234 | 222 | 211 | 104 | 269 |
| 2000 | 266 | 190 | 43 | 146 | 154 | 147 | 176 | 209 | 142 | 85 | 92 | 140 |
| 2001 | 104 | 125 | 129 | 222 | 223 | 246 | 243 | 283 | 240 | 279 | 199 | 265 |
| 2002 | 193 | 268 | 234 | 173 | 247 | 235 | 302 | 285 | 302 | 259 | 296 | 180 |
| 2003 | 182 | 183 | 198 | 250 | 207 | 246 | 221 | 235 | 194 | 199 | 178 | 197 |
| 2004 | 261 | 166 | 93 | 204 | 225 | 217 | 243 | 285 | 253 | 215 | 232 | 176 |
| 2005 | 115 | 106 | 149 | 194 | 213 | 224 | 211 | 269 | 186 | 196 | 211 | 204 |
| 2006 | 345 | 321 | 351 | 416 | 493 | 394 | 428 | 359 | 343 | 340 | 301 | 306 |
| 2007 | 365 | 208 | 325 | 412 | 426 | 331 | 322 | 421 | 337 | 265 | 389 | 355 |
| 2008 | 376 | 326 | 330 | 408 | 447 | 508 | 411 | 452 | 481 | 467 | 288 | 386 |
| 2009 | 454 | 319 | 369 | 372 | 475 | 489 | 347 | 373 | 377 | 349 | 347 | 377 |
| 2010 | 346 | 292 | 317 | 262 | 446 | 367 | 371 | 419 | 394 | 350 | 324 | 325 |
| 2011 | 283 | 334 | 399 | 377 | 365 | 330 | 340 | 401 | 377 | 309 | 442 | 405 |
| 2012 | 377 | 334 | 270 | 353 | 471 | 444 | 425 | 550 | 506 | 433 | 449 | 429 |
| 2013 | 443 | 304 | ||||||||||
| - = 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 |