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| Refining District Appalachian No. 1 Isobutane-Isobutylene Stocks at Refineries (Thousand Barrels) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1993 | 2 | 2 | 1 | 3 | 2 | 2 | 2 | 1 | 3 | 2 | 4 | 5 |
| 1994 | 4 | 3 | 3 | 2 | 2 | 2 | 1 | 3 | 4 | 2 | 1 | 4 |
| 1995 | 2 | 3 | 2 | 3 | 2 | 3 | 2 | 2 | 3 | 2 | 3 | 3 |
| 1996 | 3 | 2 | 1 | 2 | 3 | 3 | 3 | 4 | 9 | 3 | 4 | 4 |
| 1997 | 4 | 4 | 2 | 4 | 3 | 3 | 2 | 2 | 4 | 2 | 2 | 2 |
| 1998 | 2 | 3 | 3 | 6 | 2 | 1 | 2 | 2 | 3 | 5 | 6 | 6 |
| 1999 | 6 | 4 | 3 | 2 | 3 | 2 | 3 | 2 | 7 | 8 | 6 | 4 |
| 2000 | 6 | 4 | 3 | 4 | 6 | 5 | 3 | 3 | 6 | 10 | 9 | 6 |
| 2001 | 4 | 4 | 4 | 3 | 2 | 2 | 3 | 3 | 6 | 4 | 4 | 3 |
| 2002 | 6 | 4 | 5 | 3 | 9 | 2 | 2 | 4 | 1 | 3 | 6 | 12 |
| 2003 | 5 | 6 | 5 | 10 | 14 | 18 | 5 | 4 | 5 | 8 | 5 | 7 |
| 2004 | 6 | 3 | 4 | 5 | 3 | 4 | 4 | 3 | 3 | 7 | 3 | 4 |
| 2005 | 7 | 7 | 3 | 7 | 6 | 6 | 6 | 7 | 4 | 6 | 5 | 7 |
| 2006 | 11 | 8 | 7 | 9 | 8 | 9 | 8 | 8 | 8 | 6 | 6 | 6 |
| 2007 | 7 | 8 | 4 | 10 | 8 | 11 | 15 | 10 | 11 | 10 | 6 | 6 |
| 2008 | 7 | 8 | 13 | 15 | 31 | 36 | 20 | 13 | 11 | 9 | 6 | 11 |
| 2009 | 8 | 9 | 5 | 6 | 7 | 5 | 6 | 4 | 4 | 3 | 2 | 3 |
| 2010 | 8 | 7 | 5 | 4 | 5 | 2 | 7 | 7 | 9 | 9 | 17 | 16 |
| 2011 | 12 | 9 | 9 | 10 | 6 | 7 | 11 | 13 | 6 | 10 | 23 | 22 |
| 2012 | 24 | 20 | 34 | 27 | 16 | 3 | 14 | 8 | 7 | 9 | 14 | 16 |
| 2013 | 13 | 9 | 6 | 14 | 11 | 4 | 12 | 6 | 6 | 12 | 22 | 10 |
| 2014 | 13 | 4 | 5 | 14 | 11 | 5 | 7 | 8 | 11 | 11 | 8 | 6 |
| 2015 | 13 | 11 | 10 | 9 | 10 | 10 | 12 | 10 | 15 | 14 | 12 | 16 |
| 2016 | 8 | 8 | 7 | 10 | 14 | 16 | 15 | 15 | 14 | 15 | 14 | 9 |
| 2017 | 11 | 21 | 20 | 12 | 11 | 11 | 11 | 6 | 13 | 14 | 13 | 11 |
| 2018 | 12 | 10 | 14 | 13 | 14 | 11 | 11 | 11 | 8 | 11 | 13 | 15 |
| 2019 | 13 | 15 | 16 | 15 | 10 | 11 | 13 | 15 | 8 | 11 | 7 | 8 |
| 2020 | 9 | 10 | 15 | 10 | 8 | 8 | 10 | 13 | 11 | 9 | 18 | 16 |
| 2021 | 14 | 11 | 6 | 10 | 18 | 15 | 10 | 9 | 8 | 9 | 7 | 9 |
| 2022 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2023 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 2024 | -- | |||||||||||
| - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. |
| Release Date: 3/29/2024 |
| Next Release Date: 4/30/2024 |