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| Illinois Natural Gas Vehicle Fuel Consumption (Million Cubic Feet) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2010 | 25 | 23 | 25 | 24 | 25 | 24 | 25 | 25 | 24 | 25 | 24 | 25 |
| 2011 | 22 | 20 | 22 | 21 | 22 | 21 | 22 | 22 | 21 | 22 | 21 | 22 |
| 2012 | 22 | 21 | 22 | 21 | 22 | 21 | 22 | 22 | 21 | 22 | 21 | 22 |
| 2013 | 24 | 22 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
| 2014 | 35 | 31 | 35 | 33 | 35 | 33 | 35 | 35 | 33 | 35 | 33 | 35 |
| 2015 | 33 | 30 | 33 | 32 | 33 | 32 | 33 | 33 | 32 | 33 | 32 | 33 |
| 2016 | 40 | 38 | 40 | 39 | 40 | 39 | 40 | 40 | 39 | 40 | 39 | 40 |
| 2017 | 16 | 14 | 16 | 15 | 16 | 15 | 16 | 16 | 15 | 16 | 15 | 16 |
| 2018 | 11 | 10 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 |
| 2019 | 11 | 10 | 11 | 10 | 11 | 10 | 11 | 11 | 10 | 11 | 10 | 11 |
| 2020 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| 2021 | 6 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| 2022 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| 2023 | 15 | 13 | 15 | 14 | 15 | 14 | 15 | 15 | 14 | 15 | 14 | 15 |
| 2024 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 13 | 12 | 13 | 12 | 13 |
| 2025 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | |||||
| - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. |
| Release Date: 9/30/2025 |
| Next Release Date: 10/31/2025 |