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| Refining District Appalachian No. 1 Refinery and Blender Net Production of Isobutane-Isobutylene (Thousand Barrels) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1995 | -5 | -3 | -5 | -7 | -7 | -7 | -12 | -12 | -8 | -5 | -3 | -2 |
| 1996 | 0 | -1 | -11 | -10 | -10 | -12 | -1 | -1 | 4 | -6 | 2 | 0 |
| 1997 | 0 | 0 | -4 | -12 | -3 | -3 | -3 | -1 | -4 | -2 | 0 | -2 |
| 1998 | -1 | -1 | 0 | 3 | -10 | -10 | -7 | -16 | -8 | -5 | 0 | 0 |
| 1999 | 0 | -2 | -1 | -5 | -3 | -5 | -12 | -6 | -3 | -1 | -3 | -2 |
| 2000 | 2 | -3 | -1 | 1 | -5 | 2 | -5 | 0 | -1 | 8 | -5 | -2 |
| 2001 | -2 | 0 | -2 | -1 | -2 | -6 | -1 | -1 | 3 | -7 | -9 | -6 |
| 2002 | -4 | -2 | -8 | -11 | -4 | -9 | -10 | -9 | -9 | -2 | -4 | 6 |
| 2003 | -6 | 1 | -3 | 5 | 4 | 4 | -2 | -1 | -1 | 1 | -3 | 2 |
| 2004 | -1 | -2 | 1 | -2 | -6 | -1 | -1 | -3 | 1 | -8 | 7 | |
| 2005 | -6 | -4 | 1 | -4 | 1 | -2 | -3 | -2 | -1 | 2 | ||
| 2006 | 3 | -5 | -5 | 2 | -1 | -4 | -1 | -4 | -1 | |||
| 2007 | 1 | 1 | -5 | -8 | 2 | 4 | 5 | -6 | -1 | -5 | -4 | |
| 2008 | -6 | 1 | 3 | 16 | 12 | 7 | 1 | -2 | -3 | -2 | ||
| 2009 | -3 | 1 | -10 | 1 | 1 | -2 | -2 | -2 | -1 | -1 | -4 | |
| 2010 | 5 | -6 | -11 | -14 | -8 | -21 | -8 | -1 | -8 | -14 | -7 | |
| 2011 | -4 | -11 | -10 | -9 | -5 | -9 | -12 | -14 | -10 | -4 | -27 | -16 |
| 2012 | -10 | -9 | -16 | -11 | -15 | -18 | -11 | -17 | -16 | -12 | -7 | -10 |
| 2013 | -16 | -8 | -13 | -5 | -13 | -19 | -21 | -16 | -16 | -13 | -8 | -16 |
| 2014 | -10 | -9 | 1 | -2 | -16 | -15 | -17 | -16 | -21 | -19 | -25 | -18 |
| 2015 | -20 | -17 | -15 | -13 | -25 | -22 | -18 | -22 | -14 | -18 | -22 | -22 |
| 2016 | -21 | -20 | -21 | -14 | -13 | -21 | -26 | -25 | -28 | -29 | -20 | -21 |
| 2017 | -28 | -17 | -17 | -15 | -29 | -15 | -16 | -20 | -20 | -23 | -21 | -20 |
| 2018 | -18 | -14 | -8 | -8 | -12 | -19 | -12 | -15 | -16 | -19 | -14 | |
| 2019 | -15 | -10 | -10 | -12 | -14 | -13 | -10 | -18 | -18 | -18 | -19 | -22 |
| 2020 | -24 | -19 | -15 | -19 | -16 | -19 | -17 | -14 | -13 | -11 | -11 | -11 |
| 2021 | -6 | -9 | -12 | -11 | -15 | -20 | -18 | -19 | -12 | -12 | -16 | -12 |
| 2022 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2023 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2024 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2025 | -- | -- | -- | -- | -- | -- | -- | -- | ||||
| - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. |
| Release Date: 10/31/2025 |
| Next Release Date: 11/28/2025 |