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| U.S. Refinery and Blender Net Input of Isobutane-Isobutylene (Thousand Barrels) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1981 | 2,940 | 3,127 | 3,676 | 3,294 | 3,869 | 3,772 | 3,606 | 3,940 | 3,789 | 3,681 | 3,503 | 3,267 |
| 1982 | 4,007 | 2,696 | 4,060 | 3,634 | 3,120 | 3,491 | 3,052 | 3,118 | 2,863 | 2,898 | 3,119 | 4,205 |
| 1983 | 4,206 | 2,708 | 2,738 | 2,242 | 2,530 | 1,275 | 2,887 | 3,489 | 3,113 | 2,248 | 3,607 | 3,877 |
| 1984 | 3,570 | 3,460 | 3,661 | 3,340 | 3,692 | 3,499 | 3,823 | 3,741 | 3,779 | 3,724 | 3,608 | 3,354 |
| 1985 | 3,433 | 3,334 | 3,650 | 3,833 | 4,123 | 4,482 | 4,587 | 4,587 | 4,475 | 4,311 | 4,055 | 3,894 |
| 1986 | 3,852 | 3,234 | 3,398 | 3,661 | 4,352 | 4,010 | 3,700 | 4,356 | 4,286 | 4,311 | 4,150 | 4,448 |
| 1987 | 4,388 | 3,413 | 3,726 | 4,129 | 4,176 | 4,214 | 4,610 | 4,618 | 4,032 | 3,894 | 3,742 | 3,912 |
| 1988 | 3,964 | 4,096 | 4,191 | 4,353 | 4,834 | 4,425 | 4,819 | 4,902 | 4,100 | 4,381 | 4,787 | 4,728 |
| 1989 | 4,384 | 3,649 | 4,092 | 4,259 | 4,443 | 5,243 | 4,917 | 5,057 | 4,916 | 4,603 | 4,743 | 4,847 |
| 1990 | 5,029 | 4,291 | 4,040 | 4,234 | 4,810 | 4,733 | 4,915 | 5,304 | 4,812 | 4,723 | 4,877 | 4,707 |
| 1991 | 4,090 | 3,853 | 4,441 | 4,878 | 5,151 | 5,001 | 5,396 | 5,234 | 4,629 | 4,618 | 4,457 | 4,847 |
| 1992 | 4,293 | 4,406 | 5,056 | 4,857 | 5,449 | 5,550 | 5,674 | 5,108 | 4,692 | 4,715 | 4,521 | 5,209 |
| 1993 | 4,679 | 4,380 | 4,997 | 4,923 | 5,367 | 5,299 | 5,537 | 5,767 | 5,089 | 5,297 | 5,243 | 5,302 |
| 1994 | 4,973 | 4,272 | 4,134 | 4,589 | 5,353 | 5,258 | 5,261 | 4,853 | 4,107 | 4,310 | 4,362 | 4,845 |
| 1995 | 4,162 | 3,435 | 4,477 | 4,370 | 4,458 | 4,207 | 4,896 | 4,430 | 4,699 | 4,944 | 4,345 | 4,231 |
| 1996 | 4,792 | 3,854 | 4,199 | 4,493 | 4,221 | 4,169 | 4,184 | 4,092 | 4,079 | 3,543 | 4,044 | 3,635 |
| 1997 | 3,709 | 3,310 | 3,865 | 4,175 | 4,087 | 4,009 | 4,095 | 3,715 | 3,577 | 3,701 | 3,549 | 3,555 |
| 1998 | 3,272 | 3,313 | 3,576 | 3,679 | 3,931 | 3,829 | 3,786 | 3,853 | 3,418 | 3,943 | 3,685 | 3,220 |
| 1999 | 3,200 | 2,707 | 3,729 | 4,100 | 3,954 | 3,579 | 3,616 | 3,807 | 3,486 | 3,322 | 3,067 | 3,359 |
| 2000 | 3,219 | 2,792 | 3,415 | 3,104 | 3,410 | 3,347 | 3,559 | 3,524 | 3,784 | 3,293 | 3,148 | 2,719 |
| 2001 | 2,685 | 2,663 | 3,409 | 4,134 | 4,596 | 3,998 | 4,111 | 3,798 | 3,690 | 3,413 | 3,515 | 3,532 |
| 2002 | 3,673 | 3,152 | 3,681 | 3,768 | 3,919 | 3,873 | 4,165 | 4,038 | 3,713 | 3,779 | 3,692 | 3,679 |
| 2003 | 3,360 | 3,096 | 3,377 | 3,481 | 3,849 | 3,656 | 3,963 | 4,122 | 3,656 | 3,327 | 3,328 | 3,418 |
| 2004 | 3,651 | 3,518 | 3,641 | 4,265 | 4,637 | 4,263 | 4,467 | 4,435 | 4,231 | 4,220 | 3,852 | 3,602 |
| 2005 | 3,467 | 3,535 | 3,649 | 3,974 | 4,383 | 4,658 | 4,760 | 4,740 | 4,093 | 3,987 | 3,988 | 3,796 |
| 2006 | 4,497 | 3,954 | 4,562 | 5,466 | 6,347 | 6,146 | 6,030 | 6,566 | 5,909 | 5,571 | 5,157 | 6,207 |
| 2007 | 5,413 | 4,732 | 5,847 | 6,123 | 6,654 | 6,022 | 6,603 | 6,366 | 6,147 | 5,615 | 6,099 | 5,867 |
| 2008 | 5,663 | 5,230 | 6,175 | 6,123 | 6,539 | 6,414 | 6,346 | 5,804 | 4,902 | 6,264 | 5,944 | 6,634 |
| 2009 | 5,592 | 4,470 | 5,566 | 5,819 | 6,465 | 6,265 | 5,963 | 6,119 | 5,608 | 5,804 | 5,858 | 6,056 |
| 2010 | 4,770 | 3,971 | 4,414 | 5,009 | 5,804 | 5,596 | 5,522 | 5,466 | 4,756 | 5,024 | 5,077 | 5,582 |
| 2011 | 5,146 | 4,351 | 5,540 | 5,424 | 5,774 | 6,071 | 5,974 | 6,296 | 5,929 | 6,149 | 6,029 | 5,245 |
| 2012 | 4,847 | 5,071 | 5,447 | 6,001 | 6,026 | 6,725 | 6,586 | 6,248 | 5,887 | 6,369 | 5,800 | 5,692 |
| 2013 | 5,373 | 4,709 | ||||||||||
| - = 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 |