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| Iowa Residual Fuel Oil Stocks at Refineries, Bulk Terminals, and Natural Gas Plants (Thousand Barrels) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1993 | W | W | W | W | W | W | W | W | W | W | W | W |
| 1994 | W | W | W | W | W | W | W | W | W | W | W | W |
| 1995 | W | W | W | W | W | W | W | W | W | W | W | W |
| 1996 | W | W | W | W | W | W | W | W | W | W | W | W |
| 1997 | W | W | W | W | W | W | W | W | W | W | W | W |
| 1998 | W | W | W | W | W | W | W | W | W | W | W | W |
| 1999 | W | W | W | W | W | W | W | W | ||||
| 2009 | 27 | 33 | 44 | 48 | 42 | 35 | 27 | 21 | 14 | 15 | 19 | |
| 2010 | 26 | 31 | 39 | 42 | 41 | 35 | 25 | 13 | 6 | 6 | 11 | 19 |
| 2011 | 20 | 28 | 35 | 40 | 38 | 42 | 40 | 25 | 9 | 8 | 11 | 18 |
| 2012 | 27 | 37 | 44 | 47 | 44 | 37 | 38 | 31 | 30 | 15 | 17 | 23 |
| 2013 | 26 | 30 | 35 | 43 | 39 | 32 | 22 | 14 | 9 | 8 | 13 | 22 |
| 2014 | 15 | 17 | 19 | 21 | 57 | 13 | 13 | 10 | 15 | 16 | 16 | 16 |
| 2015 | 17 | 17 | 17 | 17 | 17 | 15 | 11 | 8 | 7 | 6 | 6 | 6 |
| 2016 | 6 | 6 | 6 | 8 | 7 | 6 | 6 | 3 | 1 | 2 | 2 | 2 |
| 2017 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 |
| 2018 | 2 | 2 | 2 | 3 | 2 | 1 | 1 | 1 | 3 | 3 | 3 | |
| 2019 | 3 | 3 | 3 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | |
| 2020 | 1 | 1 | 5 | 4 | 3 | 2 | 1 | 1 | 1 | 1 | 1 | 1 |
| 2021 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||
| 2022 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||
| 2023 | 1 | 1 | 1 | 1 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | |
| 2024 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 2025 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||||
| - = 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 |