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|View History: Annual Download Data (XLS File)                                                        
|View History: Annual                                                                                  
|View History: Annual                                                                                  
|View History:                                                                                         
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|Montana Natural Gas Delivered to Residential Consumers for the Account of Others  (Million Cubic Feet)
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|Montana Natural Gas Delivered to Residential Consumers for the Account of Others  (Million Cubic Feet)
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|Decade                                                                                                                            | Year-0 | Year-1 | Year-2 | Year-3 | Year-4 | Year-5 | Year-6 | Year-7 | Year-8 | Year-9
|--------------------------------------------------------------------------------------------------------------------------------- | ------ | ------ | ------ | ------ | ------ | ------ | ------ | ------ | ------ | ------
|1980's                                                                                                                            |        |        |        |        |        |        |        |        | 0      | 0     
|1990's                                                                                                                            | 0      | 0      | 0      | 0      | 0      | 218    | 0      | 0      | 0      | 0     
|2000's                                                                                                                            | 0      | 0      | 0      | 0      | 0      | 0      | 14     | 28     | 30     | 34    
|2010's                                                                                                                            | 32     | 34     | 29     | 31     | 38     | 49     | 80     | 126    | 111    | 100   
|2020's                                                                                                                            | 71     | 57     | 56     |        |        |        |        |        |        |       
|- = No Data Reported;  -- = Not Applicable;  NA = Not Available;  W = Withheld to avoid disclosure of individual company data.
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|Release Date: 7/31/2024                                                                                                          
|Next Release Date: 8/30/2024