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| Midwest (PADD 2) Refinery and Blender Net Input of Isobutane-Isobutylene (Thousand Barrels) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1981 | 1,042 | 1,563 | 1,967 | 1,457 | 1,882 | 1,253 | 1,249 | 1,496 | 1,317 | 1,598 | 1,481 | 1,691 |
| 1982 | 1,397 | 1,410 | 1,524 | 1,495 | 1,308 | 1,478 | 1,509 | 1,339 | 1,327 | 1,136 | 1,248 | 1,486 |
| 1983 | 1,413 | 1,074 | 1,063 | 1,065 | 1,151 | 627 | 1,256 | 1,248 | 1,195 | 1,242 | 1,353 | 1,322 |
| 1984 | 1,401 | 1,337 | 1,357 | 1,156 | 1,517 | 1,550 | 1,439 | 1,416 | 1,247 | 1,341 | 1,414 | 1,504 |
| 1985 | 1,271 | 1,267 | 1,369 | 1,163 | 1,202 | 1,483 | 1,410 | 1,433 | 1,324 | 1,467 | 1,532 | 1,428 |
| 1986 | 1,367 | 1,064 | 1,256 | 1,007 | 1,280 | 1,410 | 1,408 | 1,533 | 1,382 | 1,311 | 1,386 | 1,468 |
| 1987 | 1,515 | 1,240 | 1,424 | 1,501 | 1,546 | 1,443 | 1,475 | 1,439 | 1,502 | 1,266 | 1,365 | 1,297 |
| 1988 | 1,215 | 1,283 | 1,419 | 1,397 | 1,557 | 1,559 | 1,507 | 1,451 | 1,210 | 1,070 | 1,479 | 1,502 |
| 1989 | 1,439 | 1,362 | 1,309 | 1,283 | 1,364 | 1,385 | 1,345 | 1,380 | 1,383 | 1,220 | 1,268 | 1,431 |
| 1990 | 1,435 | 1,217 | 1,364 | 1,185 | 1,252 | 1,292 | 1,419 | 1,556 | 1,389 | 1,398 | 1,338 | 1,456 |
| 1991 | 1,231 | 1,315 | 1,355 | 1,724 | 1,849 | 1,560 | 1,492 | 1,615 | 1,348 | 1,065 | 1,270 | 1,398 |
| 1992 | 1,452 | 1,287 | 1,503 | 1,222 | 1,482 | 1,492 | 1,586 | 1,324 | 1,170 | 1,128 | 1,363 | 1,498 |
| 1993 | 1,377 | 1,179 | 1,373 | 1,204 | 1,472 | 1,393 | 1,259 | 1,421 | 1,323 | 1,587 | 1,517 | 1,462 |
| 1994 | 1,225 | 1,073 | 1,151 | 1,120 | 1,437 | 1,341 | 1,354 | 1,296 | 944 | 1,011 | 1,359 | 1,454 |
| 1995 | 1,367 | 1,057 | 1,283 | 1,029 | 1,158 | 996 | 1,205 | 1,122 | 1,209 | 1,350 | 1,372 | 1,179 |
| 1996 | 1,333 | 1,019 | 1,057 | 1,030 | 1,015 | 1,099 | 1,018 | 1,093 | 1,132 | 920 | 1,048 | 900 |
| 1997 | 889 | 745 | 948 | 1,097 | 908 | 900 | 936 | 787 | 872 | 922 | 935 | 846 |
| 1998 | 748 | 702 | 744 | 811 | 1,021 | 914 | 1,124 | 1,031 | 647 | 983 | 895 | 835 |
| 1999 | 843 | 898 | 934 | 973 | 1,004 | 955 | 890 | 904 | 870 | 715 | 545 | 774 |
| 2000 | 736 | 567 | 787 | 877 | 937 | 904 | 988 | 999 | 938 | 757 | 651 | 611 |
| 2001 | 680 | 650 | 854 | 1,001 | 1,162 | 935 | 893 | 917 | 1,013 | 1,008 | 820 | 1,018 |
| 2002 | 1,087 | 957 | 1,110 | 977 | 996 | 981 | 1,109 | 1,087 | 1,118 | 1,059 | 1,148 | 974 |
| 2003 | 908 | 840 | 740 | 922 | 931 | 903 | 956 | 1,027 | 720 | 618 | 742 | 743 |
| 2004 | 1,075 | 884 | 913 | 993 | 1,114 | 1,192 | 1,236 | 1,238 | 1,281 | 1,181 | 1,115 | 1,078 |
| 2005 | 950 | 877 | 837 | 1,093 | 1,194 | 1,327 | 1,302 | 1,388 | 1,311 | 1,434 | 1,378 | 1,136 |
| 2006 | 1,253 | 1,109 | 1,269 | 1,453 | 1,450 | 1,482 | 1,632 | 1,598 | 1,424 | 1,121 | 987 | 1,350 |
| 2007 | 1,303 | 1,031 | 1,214 | 1,513 | 1,647 | 1,335 | 1,491 | 1,526 | 1,385 | 1,134 | 1,335 | 1,385 |
| 2008 | 1,320 | 1,167 | 1,199 | 1,355 | 1,513 | 1,664 | 1,536 | 1,280 | 1,364 | 1,245 | 1,355 | 1,500 |
| 2009 | 1,502 | 1,357 | 1,468 | 1,308 | 1,587 | 1,630 | 1,424 | 1,463 | 1,370 | 1,266 | 1,307 | 1,345 |
| 2010 | 1,285 | 1,032 | 1,081 | 1,124 | 1,423 | 1,397 | 1,283 | 1,478 | 1,175 | 1,030 | 1,271 | 1,426 |
| 2011 | 1,394 | 1,137 | 1,515 | 1,337 | 1,184 | 1,229 | 1,370 | 1,418 | 1,395 | 1,213 | 1,389 | 1,215 |
| 2012 | 1,177 | 1,142 | 1,128 | 1,225 | 1,317 | 1,486 | 1,548 | 1,640 | 1,674 | 1,465 | 1,451 | 1,455 |
| 2013 | 1,272 | 1,156 | ||||||||||
| - = 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 |