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| Iowa Natural Gas Supplemental Gas - Propane Air (Million Cubic Feet) | |||||
| Decade | Year-0 | Year-1 | Year-2 | Year-3 | Year-4 | Year-5 | Year-6 | Year-7 | Year-8 | Year-9 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1980's | 57 | 15 | 46 | 1 | 0 | 0 | 5 | 3 | 5 | 28 |
| 1990's | 24 | 3 | 2 | 84 | 30 | 9 | 301 | 137 | 17 | 12 |
| 2000's | 44 | 39 | 23 | 118 | 14 | 2 | 1 | 2 | 24 | 3 |
| 2010's | 2 | 1 | 1 | 0 | 2 | |||||
| 2020's | 0 | 0 |
| - = 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 |