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| Mountain Producing Region Natural Gas in Underground Storage - Change in Working Gas from Same Month Previous Year (Percent) | |||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2015 | -4.70 | 13.00 | 35.00 | 41.50 | 36.90 | 27.10 | 22.30 | 18.60 | 16.40 | 14.60 | 18.60 | 22.30 |
| 2016 | 18.80 | 23.50 | 27.10 | 30.70 | 30.40 | 26.80 | 21.10 | 16.90 | 14.30 | 15.60 | 21.20 | 10.10 |
| 2017 | 2.30 | -1.80 | -1.70 | -0.50 | -5.40 | -6.20 | -5.10 | -7.80 | -6.00 | -11.10 | -12.20 | -13.50 |
| 2018 | -15.20 | -28.30 | -38.60 | -39.60 | -28.10 | -23.90 | -25.00 | -18.90 | -17.90 | -17.00 | -23.90 | -20.00 |
| 2019 | -23.40 | -27.40 | -27.20 | -16.10 | -15.10 | -3.50 | 7.20 | 8.80 | 11.80 | 12.60 | 16.90 | 18.30 |
| 2020 | 30.50 | 35.90 | 45.00 | 43.20 | 40.80 | 31.00 | 26.10 | 20.70 | 17.30 | 16.10 | 20.40 | 16.60 |
| 2021 | 14.70 | 15.80 | 23.50 | 13.10 | 8.00 | -1.10 | -7.80 | -11.30 | -12.70 | -10.90 | -13.50 | -12.20 |
| 2022 | -17.40 | -19.40 | -20.30 | -24.90 | -24.70 | -21.70 | -20.10 | -16.30 | -10.20 | -3.40 | -4.90 | -8.00 |
| 2023 | -4.00 | 0.90 | -12.30 | 5.50 | 17.00 | 25.20 | 30.30 | 35.70 | 30.00 | 22.20 | 26.90 | 44.50 |
| 2024 | 50.70 | 80.10 | 111.70 | 90.60 | 58.00 | 38.80 | 31.90 | 23.90 | 17.80 | 15.10 | 16.60 | 13.70 |
| 2025 | 8.70 | 1.30 | 1.20 | -3.30 | -3.00 | -2.50 | -1.50 | |||||
| - = 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 |