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| East Coast (PADD 1) Refinery and Blender Net Production of Isobutane-Isobutylene (Thousand Barrels per Day) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1981 | 0 | 0 | ||||||||||
| 1986 | 0 | -2 | -1 | -2 | -3 | -2 | -3 | -2 | -1 | -3 | -2 | -3 |
| 1987 | 0 | -1 | 2 | 0 | 0 | 2 | 2 | 1 | 1 | 2 | 1 | 1 |
| 1988 | 1 | -1 | 0 | 2 | 4 | 0 | 2 | 1 | 1 | 1 | 0 | 0 |
| 1989 | 1 | 0 | -1 | 0 | 1 | 2 | 1 | 1 | 3 | 3 | 0 | 0 |
| 1990 | -1 | -2 | -1 | -1 | -3 | -4 | 0 | -2 | -1 | -2 | -2 | -2 |
| 1991 | -1 | -2 | -2 | -1 | -3 | -1 | -3 | -1 | -1 | -2 | -2 | -1 |
| 1992 | -1 | -1 | 0 | 1 | 1 | -3 | -2 | -2 | -2 | -2 | 0 | -1 |
| 1993 | 0 | -1 | -3 | -1 | 0 | -3 | -3 | -2 | -3 | 1 | -2 | -1 |
| 1994 | 1 | 1 | -1 | -4 | -1 | -4 | -3 | -2 | -2 | -2 | 1 | 0 |
| 1995 | -2 | -3 | -2 | -3 | -3 | -2 | -1 | 0 | 0 | 1 | -1 | 0 |
| 1996 | -1 | -2 | -1 | 3 | 2 | 2 | 1 | 0 | 3 | 0 | -2 | 0 |
| 1997 | -1 | 4 | -5 | -2 | -1 | -4 | -4 | -5 | 0 | -2 | 0 | -1 |
| 1998 | -9 | -7 | -1 | 1 | -5 | -3 | -4 | -2 | -5 | -4 | -5 | -2 |
| 1999 | -3 | -4 | -6 | -5 | -3 | -6 | 0 | -7 | -6 | -7 | -4 | -3 |
| 2000 | -4 | 2 | -4 | -3 | -3 | 1 | -2 | -5 | -3 | -5 | -7 | -3 |
| 2001 | -3 | -1 | -5 | -6 | -5 | -10 | -6 | -2 | -3 | -7 | -7 | -5 |
| 2002 | -5 | -4 | -5 | -4 | -3 | -3 | -2 | -8 | -5 | -4 | -5 | -3 |
| 2003 | -2 | -5 | -6 | -1 | -2 | 3 | -10 | -5 | -6 | -6 | -5 | -5 |
| 2004 | -2 | -5 | -12 | -3 | -1 | -4 | -3 | -2 | -6 | -6 | -7 | -4 |
| 2005 | -4 | -2 | -5 | -3 | -3 | -5 | -3 | -6 | -7 | -1 | -6 | -7 |
| 2006 | 2 | 7 | -5 | 0 | 10 | 2 | 0 | -3 | -1 | 1 | -2 | 2 |
| 2007 | 2 | -3 | 3 | 2 | 2 | 0 | 9 | 2 | 5 | 1 | -1 | 2 |
| 2008 | 3 | 0 | 5 | 5 | 2 | 5 | 2 | 0 | 8 | 1 | -2 | 6 |
| 2009 | -2 | -1 | 0 | -4 | 4 | 3 | -2 | 5 | -7 | 3 | 5 | 0 |
| 2010 | 0 | 0 | -7 | 4 | 4 | 2 | -2 | -3 | -2 | -4 | -3 | -4 |
| 2011 | 0 | -3 | -2 | -6 | 0 | -2 | -6 | -4 | -7 | -1 | 0 | 0 |
| 2012 | 2 | 3 | -2 | -1 | -1 | 1 | 1 | -3 | -3 | -2 | -3 | -2 |
| 2013 | -2 | -4 | -3 | 0 | 1 | 0 | 1 | 0 | 0 | -1 | 0 | -1 |
| 2014 | -1 | -1 | 0 | 1 | 0 | -1 | 1 | 0 | -1 | 0 | -1 | -2 |
| 2015 | 0 | -2 | -1 | -1 | 0 | 0 | -1 | 0 | -4 | -2 | -1 | 0 |
| 2016 | 0 | 0 | 0 | 1 | 2 | 2 | 2 | 0 | 1 | 0 | -1 | -1 |
| 2017 | 2 | -2 | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 1 | 1 | 0 |
| 2018 | 0 | -1 | -2 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | -2 |
| 2019 | 0 | 1 | 1 | 0 | 2 | 1 | 1 | 0 | 1 | -2 | -2 | -1 |
| 2020 | 1 | 0 | -1 | 0 | -1 | -3 | -4 | -1 | -4 | -5 | -4 | -4 |
| 2021 | -4 | -3 | -2 | -4 | -2 | -2 | 0 | 0 | -1 | 1 | 1 | -1 |
| 2022 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2023 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2024 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2025 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | |
| - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. |
| Release Date: 2/6/2026 |
| Next Release Date: 2/27/2026 |