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| U.S. Refinery and Blender Net Production of Isobutane (Thousand Barrels) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1993 | 176 | 252 | 334 | 255 | 679 | 420 | 402 | 507 | 286 | 97 | 159 | 241 |
| 1994 | 354 | 180 | 359 | 162 | 164 | 438 | 549 | 802 | 114 | 140 | 58 | 271 |
| 1995 | -196 | -38 | 550 | 532 | 263 | 472 | 726 | 475 | 181 | 423 | 245 | -14 |
| 1996 | 176 | 202 | 404 | 274 | 93 | 642 | 371 | 200 | 522 | 245 | -227 | -175 |
| 1997 | 329 | 18 | 124 | 386 | 468 | 188 | 497 | 250 | 424 | 228 | 14 | 113 |
| 1998 | 325 | 167 | 250 | 680 | 228 | 478 | 633 | 131 | 175 | 55 | -171 | -37 |
| 1999 | 216 | 286 | -6 | 564 | 439 | 297 | 634 | -155 | 88 | -38 | -283 | -134 |
| 2000 | -95 | -95 | 57 | 165 | 235 | 327 | 508 | 239 | -51 | 50 | -253 | -171 |
| 2001 | 113 | 39 | 4 | -39 | 355 | -80 | -130 | 6 | -84 | -419 | -637 | -679 |
| 2002 | -375 | -45 | 105 | 0 | -121 | 0 | 123 | -62 | 97 | -697 | -684 | -323 |
| 2003 | -633 | -187 | -312 | -383 | -687 | 41 | -517 | -511 | 7 | -411 | -271 | -402 |
| 2004 | -509 | -595 | -681 | -330 | -753 | -817 | -836 | -688 | -539 | -803 | -434 | -466 |
| 2005 | -603 | -923 | -1,215 | -900 | -1,222 | -1,171 | -976 | -974 | -1,037 | -933 | -349 | -830 |
| 2006 | -46 | -99 | -52 | -191 | 367 | -377 | -161 | 72 | -124 | -90 | -175 | -50 |
| 2007 | 249 | 598 | 392 | 16 | 300 | 18 | 337 | 40 | 56 | 3 | -241 | -306 |
| 2008 | 22 | 99 | 522 | 464 | 253 | 151 | -147 | 81 | 293 | -99 | -49 | 478 |
| 2009 | 221 | 190 | -132 | -110 | -391 | -11 | -420 | -24 | -297 | -165 | 84 | 503 |
| 2010 | 160 | -49 | -264 | 0 | -13 | 25 | 9 | -394 | -320 | -197 | -180 | -292 |
| 2011 | 39 | 432 | 47 | -30 | -62 | -58 | -394 | -223 | -215 | -237 | 47 | -92 |
| 2012 | 139 | 315 | 493 | 465 | -305 | -184 | 77 | -166 | -113 | 447 | -75 | -223 |
| 2013 | 122 | 326 | ||||||||||
| - = 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 |