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|View History:  Monthly  Annual Download Data (XLS File)                                         
|View History:  Monthly  Annual                                                                   
|View History:  Monthly  Annual                                                                   
|View History:                                                                                    
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|Percent of Industrial Natural Gas Deliveries in Massachusetts Represented by the Price  (Percent)
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|Percent of Industrial Natural Gas Deliveries in Massachusetts Represented by the Price  (Percent)
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|Year                                                                                                                              | Jan  | Feb  | Mar  | Apr  | May  | Jun  | Jul  | Aug  | Sep  | Oct  | Nov  | Dec 
|--------------------------------------------------------------------------------------------------------------------------------- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ----
|2001                                                                                                                              | 36.9 | 37.4 | 48.4 | 27.7 | 23.2 | 18.9 | 14.1 | 10.3 | 18.5 | 18.6 | 29.5 | 21.8
|2002                                                                                                                              | 27.5 | 26.6 | 23.0 | 21.7 | 16.9 | 14.0 | 16.5 | 11.1 | 9.4  | 14.8 | 21.7 | 28.6
|2003                                                                                                                              | 40.7 | 44.0 | 44.6 | 41.6 | 37.9 | 36.3 | 38.9 | 42.3 | 35.8 | 78.7 | 23.9 | 36.9
|2004                                                                                                                              | 47.9 | 47.2 | 45.8 | 39.9 | 36.5 | 34.4 | 31.3 | 27.0 | 23.1 | 29.2 | 23.2 | 40.5
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|2005                                                                                                                              | 40.9 | 43.4 | 42.6 | 37.2 | 32.0 | 29.0 | 26.8 | 22.1 | 22.3 | 26.9 | 33.6 | 40.9
|2006                                                                                                                              | 42.4 | 41.0 | 40.2 | 36.9 | 31.5 | 28.6 | 25.2 | 26.5 | 26.5 | 23.7 | 32.2 | 31.2
|2007                                                                                                                              | 34.8 | 36.0 | 37.0 | 30.2 | 29.7 | 21.0 | 19.4 | 19.2 | 20.2 | 22.3 | 24.9 | 31.6
|2008                                                                                                                              | 23.9 | 20.4 | 21.7 | 15.0 | 19.6 | 18.2 | 18.3 | 15.6 | 18.3 | 20.5 | 24.2 | 25.6
|2009                                                                                                                              | 25.5 | 23.0 | 24.4 | 18.1 | 17.4 | 18.6 | 18.6 | 17.3 | 13.8 | 20.1 | 20.4 | 25.9
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|2010                                                                                                                              | 26.3 | 23.1 | 25.8 | 19.6 | 18.0 | 17.1 | 15.0 | 16.2 | 16.1 | 21.2 | 21.7 | 25.5
|2011                                                                                                                              | 24.1 | 22.1 | 22.3 | 17.1 | 25.2 | 14.5 | 13.1 | 15.5 | 15.0 | 23.5 | 18.6 | 25.5
|2012                                                                                                                              | 21.9 | 19.3 | 19.4 | 14.2 | 15.6 | 15.0 | 15.2 | 16.5 | 14.0 | 16.1 | 18.7 | 18.7
|2013                                                                                                                              | 21.6 | 18.9 | 19.6 | 18.5 | 20.1 | 13.7 | 13.6 | 12.6 | 16.2 | 11.9 | 17.8 | 26.6
|2014                                                                                                                              | 23.3 | 24.7 | 24.5 | 24.3 | 20.2 | 18.1 | 20.3 | 16.4 | 19.4 | 18.0 | 19.6 | 27.2
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|2015                                                                                                                              | 30.8 | 32.3 | 34.6 | 30.2 | 23.5 | 24.1 | 21.6 | 20.0 | 19.3 | 18.2 | 19.9 | 24.6
|2016                                                                                                                              | 26.1 | 30.2 | 32.1 | 27.6 | 24.2 | 23.4 | 23.2 | 20.9 | 22.0 | 22.1 | 22.3 | 26.3
|2017                                                                                                                              | 29.7 | 27.1 | 28.0 | 27.3 | 24.0 | 23.5 | 22.3 | 22.0 | 22.3 | 24.9 | 25.1 | 30.4
|2018                                                                                                                              | 31.5 | 29.9 | 28.7 | 26.7 | 28.7 | 21.3 | 22.2 | 23.2 | 22.0 | 20.4 | 26.0 | 27.8
|2019                                                                                                                              | 28.2 | 28.7 | 31.6 | 26.7 | 22.6 | 24.3 | 25.1 | 20.0 | 22.7 | 21.0 | 22.2 | 28.8
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|2020                                                                                                                              | 26.9 | 26.3 | 28.1 | 26.5 | 21.8 | 23.7 | 20.2 | 18.5 | 19.7 | 19.2 | 21.4 | 27.8
|2021                                                                                                                              | 28.0 | 25.8 | 29.6 | 25.4 | 23.4 | 21.4 | 21.9 | 23.0 | 19.9 | 22.2 | 26.6 | 26.3
|2022                                                                                                                              | 29.9 | 29.3 | 31.5 | 32.0 | 29.5 | 24.2 | 22.3 | 23.9 | 23.4 | 25.7 | 31.1 | 29.9
|2023                                                                                                                              | 31.3 | 31.7 | 30.7 | 27.6 | 26.1 | 25.4 | 22.0 | 24.5 | 21.1 | 23.4 | 25.5 | 27.1
|2024                                                                                                                              | 33.5 | 28.4 | 30.5 | 27.3 | 26.5 |      |      |      |      |      |      |     
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|- = 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