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| Rocky Mountain (PADD 4) Refinery and Blender Net Input of Normal Butane-Butylene (Thousand Barrels) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1981 | 370 | 346 | 305 | 160 | 199 | 238 | 226 | 227 | 269 | 348 | 380 | 572 |
| 1982 | 400 | 234 | 284 | 206 | 234 | 221 | 235 | 305 | 313 | 322 | 371 | 428 |
| 1983 | 205 | 200 | 172 | 125 | 171 | 167 | 176 | 214 | 206 | 219 | 245 | 272 |
| 1984 | 246 | 299 | 285 | 170 | 255 | 242 | 250 | 268 | 298 | 331 | 369 | 322 |
| 1985 | 516 | 441 | 382 | 306 | 291 | 303 | 203 | 351 | 343 | 445 | 496 | 443 |
| 1986 | 436 | 343 | 324 | 160 | 277 | 307 | 334 | 318 | 357 | 379 | 413 | 469 |
| 1987 | 480 | 389 | 461 | 325 | 320 | 296 | 326 | 302 | 330 | 400 | 519 | 502 |
| 1988 | 547 | 434 | 502 | 317 | 282 | 283 | 305 | 316 | 355 | 310 | 474 | 566 |
| 1989 | 581 | 403 | 358 | 194 | 318 | 233 | 283 | 325 | 311 | 437 | 487 | 507 |
| 1990 | 489 | 349 | 282 | 161 | 248 | 264 | 241 | 289 | 322 | 442 | 541 | 482 |
| 1991 | 467 | 378 | 216 | 162 | 181 | 219 | 245 | 298 | 349 | 435 | 507 | 499 |
| 1992 | 430 | 259 | 225 | 76 | 137 | 149 | 150 | 186 | 222 | 360 | 405 | 448 |
| 1993 | 434 | 275 | 198 | 152 | 130 | 135 | 182 | 166 | 250 | 299 | 382 | 412 |
| 1994 | 356 | 228 | 180 | 90 | 140 | 118 | 110 | 138 | 212 | 332 | 402 | 405 |
| 1995 | 375 | 201 | 166 | 120 | 129 | 96 | 81 | 89 | 92 | 182 | 378 | 417 |
| 1996 | 393 | 212 | 114 | 116 | 81 | 62 | 69 | 83 | 211 | 291 | 415 | 392 |
| 1997 | 362 | 197 | 167 | 91 | 140 | 114 | 104 | 112 | 211 | 293 | 389 | 423 |
| 1998 | 355 | 227 | 188 | 69 | 96 | 77 | 83 | 120 | 135 | 184 | 271 | 318 |
| 1999 | 299 | 142 | 148 | 35 | 68 | 79 | 95 | 126 | 156 | 254 | 356 | 331 |
| 2000 | 300 | 215 | 180 | 138 | 112 | 118 | 114 | 109 | 177 | 232 | 323 | 326 |
| 2001 | 318 | 176 | 170 | 107 | 101 | 143 | 126 | 118 | 163 | 287 | 314 | 319 |
| 2002 | 286 | 204 | 145 | 87 | 124 | 105 | 100 | 140 | 157 | 243 | 283 | 280 |
| 2003 | 277 | 180 | 140 | 82 | 79 | 125 | 162 | 129 | 182 | 265 | 246 | 311 |
| 2004 | 304 | 213 | 209 | 139 | 127 | 101 | 116 | 147 | 152 | 210 | 224 | 266 |
| 2005 | 259 | 171 | 125 | 87 | 87 | 124 | 111 | 136 | 152 | 205 | 220 | 217 |
| 2006 | 347 | 284 | 183 | 91 | 126 | 98 | 130 | 154 | 184 | 200 | 275 | 314 |
| 2007 | 330 | 225 | 177 | 59 | 78 | 112 | 126 | 126 | 145 | 265 | 326 | 345 |
| 2008 | 291 | 280 | 190 | 106 | 113 | 128 | 126 | 121 | 130 | 237 | 303 | 319 |
| 2009 | 312 | 200 | 169 | 66 | 85 | 113 | 112 | 111 | 106 | 165 | 175 | 162 |
| 2010 | 212 | 195 | 139 | 124 | 101 | 84 | 107 | 90 | 87 | 111 | 225 | 201 |
| 2011 | 149 | 171 | 98 | 88 | 97 | 101 | 112 | 110 | 177 | 193 | 278 | 266 |
| 2012 | 303 | 220 | 204 | 110 | 73 | 106 | 119 | 97 | 163 | 239 | 268 | 337 |
| 2013 | 267 | 191 | ||||||||||
| - = 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 |