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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 Commercial Natural Gas Deliveries in Connecticut Represented by the Price  (Percent)
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|Percent of Commercial Natural Gas Deliveries in Connecticut Represented by the Price  (Percent)
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|Year                                                                                                                              | Jan   | Feb   | Mar  | Apr  | May  | Jun  | Jul  | Aug  | Sep  | Oct   | Nov   | Dec  
|--------------------------------------------------------------------------------------------------------------------------------- | ----- | ----- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ----- | ----- | -----
|1989                                                                                                                              | 100.0 | 100.0 | 98.4 | 90.0 | 81.6 | 76.5 | 74.5 | 80.4 | 74.8 | 85.5  | 90.8  | 99.5 
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|1990                                                                                                                              | 100.0 | 100.0 | 98.7 | 95.9 | 92.3 | 89.9 | 87.5 | 86.9 | 87.2 | 91.3  | 98.3  | 99.1 
|1991                                                                                                                              | 99.4  | 99.4  | 97.5 | 92.5 | 85.9 | 79.2 | 76.2 | 77.1 | 77.9 | 85.9  | 93.0  | 96.6 
|1992                                                                                                                              | 97.7  | 97.2  | 95.6 | 94.4 | 93.6 | 87.2 | 95.8 | 98.8 | 98.7 | 97.8  | 98.2  | 98.4 
|1993                                                                                                                              | 97.2  | 97.7  | 97.2 | 98.1 | 99.4 | 99.3 | 88.3 | 98.4 | 99.6 | 100.0 | 100.0 | 100.0
|1994                                                                                                                              | 89.2  | 90.7  | 88.4 | 88.8 | 74.2 | 67.8 | 62.4 | 61.1 | 57.4 | 68.8  | 77.9  | 83.4 
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|1995                                                                                                                              | 86.7  | 88.1  | 85.7 | 81.6 | 75.5 | 66.1 | 61.8 | 63.7 | 72.1 | 81.6  | 87.7  | 91.7 
|1996                                                                                                                              | 93.3  | 93.1  | 93.1 | 89.8 | 78.5 | 78.9 | 81.1 | 77.6 | 68.9 | 81.3  | 84.0  | 87.9 
|1997                                                                                                                              | 90.2  | 90.2  | 87.0 | 87.2 | 80.3 | 79.6 | 76.0 | 80.2 | 75.0 | 68.6  | 71.1  | 77.2 
|1998                                                                                                                              | 78.4  | 78.1  | 71.1 | 62.2 | 76.2 | 61.0 | 62.3 | 58.0 | 55.2 | 61.3  | 76.1  | 62.6 
|1999                                                                                                                              | 69.6  | 69.7  | 67.4 | 73.0 | 53.6 | 56.9 | 55.6 | 51.6 | 51.9 | 56.5  | 58.4  | 62.9 
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|2000                                                                                                                              | 69.6  | 80.6  | 79.3 | 77.0 | 79.4 | 80.7 | 83.0 | 81.0 | 82.7 | 79.8  | 75.7  | 78.9 
|2001                                                                                                                              | 76.7  | 74.5  | 77.9 | 73.2 | 77.6 | 83.8 | 77.8 | 71.6 | 82.5 | 71.3  | 78.3  | 85.7 
|2002                                                                                                                              | 70.7  | 73.8  | 84.2 | 60.3 | 70.3 | 71.7 | 74.7 | 75.6 | 73.1 | 66.1  | 74.8  | 70.8 
|2003                                                                                                                              | 68.6  | 64.9  | 68.4 | 66.1 | 64.1 | 66.5 | 69.8 | 76.5 | 66.2 | 62.9  | 69.5  | 73.8 
|2004                                                                                                                              | 70.9  | 72.2  | 69.7 | 69.6 | 68.1 | 65.2 | 65.4 | 70.3 | 66.3 | 62.9  | 65.4  | 68.9 
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|2005                                                                                                                              | 71.5  | 74.8  | 71.2 | 71.3 | 66.3 | 71.9 | 70.0 | 68.0 | 67.1 | 62.9  | 66.7  | 70.1 
|2006                                                                                                                              | 75.6  | 70.7  | 74.8 | 71.5 | 68.5 | 68.6 | 68.7 | 67.4 | 66.1 | 67.3  | 68.8  | 70.6 
|2007                                                                                                                              | 71.2  | 73.3  | 75.1 | 73.6 | 72.3 | 67.2 | 68.2 | 70.2 | 67.0 | 66.7  | 69.0  | 70.9 
|2008                                                                                                                              | 73.2  | 72.5  | 72.1 | 74.0 | 69.0 | 69.6 | 68.1 | 69.9 | 68.7 | 65.2  | 67.3  | 69.9 
|2009                                                                                                                              | 71.6  | 73.1  | 72.6 | 72.5 | 64.5 | 65.3 | 66.2 | 59.5 | 64.0 | 63.0  | 65.4  | 68.3 
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|2010                                                                                                                              | 70.4  | 69.7  | 70.0 | 62.9 | 61.1 | 61.0 | 58.3 | 60.2 | 57.1 | 59.3  | 62.7  | 65.9 
|2011                                                                                                                              | 68.0  | 65.8  | 66.9 | 68.3 | 64.4 | 63.6 | 64.6 | 62.8 | 63.5 | 61.6  | 64.2  | 63.0 
|2012                                                                                                                              | 67.5  | 66.9  | 67.5 | 61.3 | 61.7 | 60.6 | 63.8 | 65.3 | 66.4 | 60.8  | 63.4  | 66.9 
|2013                                                                                                                              | 55.5  | 57.2  | 54.2 | 55.3 | 51.8 | 50.3 | 61.4 | 57.9 | 60.0 | 56.2  | 63.0  | 66.4 
|2014                                                                                                                              | 64.4  | 68.3  | 66.5 | 64.6 | 64.2 | 59.9 | 63.3 | 63.6 | 64.9 | 64.2  | 72.7  | 77.3 
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|2015                                                                                                                              | 78.4  | 79.1  | 80.5 | 77.2 | 72.0 | 70.6 | 71.9 | 67.6 | 66.9 | 73.4  | 75.3  | 78.4 
|2016                                                                                                                              | 79.5  | 80.7  | 79.9 | 75.8 | 73.1 | 71.1 | 71.0 | 69.5 | 71.8 | 72.7  | 75.7  | 77.6 
|2017                                                                                                                              | 79.8  | 76.8  | 79.7 | 76.9 | 72.7 | 72.4 | 73.0 | 72.2 | 73.5 | 72.9  | 76.5  | 78.9 
|2018                                                                                                                              | 80.4  | 80.1  | 78.6 | 76.2 | 72.2 | 72.5 | 72.1 | 71.1 | 71.5 | 72.8  | 75.2  | 77.6 
|2019                                                                                                                              | 79.2  | 80.1  | 79.7 | 78.3 | 74.7 | 73.1 | 72.4 | 72.7 | 72.6 | 73.4  | 76.9  | 81.0 
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|2020                                                                                                                              | 79.9  | 78.4  | 78.1 | 76.1 | 75.6 | 70.6 | 71.4 | 68.1 | 70.2 | 70.0  | 77.9  | 78.2 
|2021                                                                                                                              | 80.0  | 78.8  | 78.2 | 75.9 | 71.2 | 72.5 | 67.4 | 68.3 | 73.0 | 69.1  | 76.2  | 80.7 
|2022                                                                                                                              | 83.8  | 85.4  | 82.2 | 83.5 | 78.8 | 77.1 | 73.1 | 74.5 | 77.1 | 75.3  | 77.9  | 82.1 
|2023                                                                                                                              | 83.3  | 83.0  | 82.8 | 80.2 | 73.4 | 70.7 | 67.8 | 66.9 | 68.9 | 71.6  | 76.7  | 79.6 
|2024                                                                                                                              | 80.5  | 81.0  | 79.1 | 81.6 | 76.7 |      |      |      |      |       |       |      
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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