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|View History: Annual Download Data (XLS File)                                                
|View History: Annual                                                                          
|View History: Annual                                                                          
|View History:                                                                                 
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|Massachusetts Natural Gas % of Total Commercial Delivered for the Account of Others  (Percent)
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|Massachusetts Natural Gas % of Total Commercial Delivered for the Account of Others  (Percent)
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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                                                                                                                            | 0.1    | 0.2    | 0.2    | 2.5    | 23.8   | 15.1   | 25.3   | 37.4   | 42.1   | 40.2  
|2000's                                                                                                                            | 37.0   | 37.9   | 42.6   | 31.3   | 28.7   | 29.5   | 29.4   | 34.7   | 42.1   | 43.1  
|2010's                                                                                                                            | 47.3   | 50.0   | 51.4   | 60.6   | 57.7   | 54.7   | 53.0   | 53.9   | 54.3   | 61.6  
|2020's                                                                                                                            | 63.8   | 61.4   | 61.6   |        |        |        |        |        |        |       
|- = 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