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| Illinois Heat Content of Natural Gas Deliveries to Consumers (BTU per Cubic Foot) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2013 | 1,013 | 1,013 | 1,014 | 1,015 | 1,015 | 1,014 | 1,015 | 1,015 | 1,016 | 1,017 | 1,019 | 1,018 |
| 2014 | 1,020 | 1,020 | 1,020 | 1,020 | 1,020 | 1,020 | 1,022 | 1,020 | 1,021 | 1,021 | 1,023 | 1,024 |
| 2015 | 1,027 | 1,030 | 1,029 | 1,028 | 1,029 | 1,027 | 1,027 | 1,027 | 1,028 | 1,028 | 1,030 | 1,030 |
| 2016 | 1,031 | 1,031 | 1,030 | 1,032 | 1,032 | 1,027 | 1,029 | 1,030 | 1,028 | 1,029 | 1,031 | 1,033 |
| 2017 | 1,033 | 1,031 | 1,030 | 1,030 | 1,028 | 1,027 | 1,027 | 1,027 | 1,027 | 1,030 | 1,032 | 1,031 |
| 2018 | 1,032 | 1,033 | 1,031 | 1,032 | 1,029 | 1,026 | 1,027 | 1,024 | 1,025 | 1,027 | 1,030 | 1,034 |
| 2019 | 1,035 | 1,034 | 1,033 | 1,032 | 1,032 | 1,032 | 1,033 | 1,034 | 1,036 | 1,038 | 1,041 | 1,041 |
| 2020 | 1,041 | 1,041 | 1,041 | 1,042 | 1,040 | 1,040 | 1,036 | 1,038 | 1,034 | 1,039 | 1,041 | 1,042 |
| 2021 | 1,043 | 1,044 | 1,043 | 1,043 | 1,042 | 1,039 | 1,037 | 1,036 | 1,041 | 1,044 | 1,043 | 1,042 |
| 2022 | 1,043 | 1,043 | 1,042 | 1,042 | 1,045 | 1,042 | 1,042 | 1,042 | 1,044 | 1,048 | 1,045 | 1,045 |
| 2023 | 1,045 | 1,043 | 1,042 | 1,041 | 1,042 | 1,040 | 1,044 | 1,043 | 1,041 | 1,045 | 1,043 | 1,042 |
| 2024 | 1,045 | 1,045 | 1,046 | 1,042 | 1,044 | 1,046 | 1,046 | 1,045 | 1,048 | 1,049 | 1,047 | 1,046 |
| 2025 | 1,047 | 1,046 | 1,046 | 1,048 | 1,049 | 1,050 | 1,049 | 1,051 | ||||
| - = 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 |