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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 Idaho Represented by the Price  (Percent)
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|Percent of Commercial Natural Gas Deliveries in Idaho Represented by the Price  (Percent)
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|Year                                                                                                                              | Jan  | Feb  | Mar  | Apr  | May  | Jun  | Jul  | Aug  | Sep  | Oct  | Nov  | Dec 
|--------------------------------------------------------------------------------------------------------------------------------- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ----
|1989                                                                                                                              | 88.9 | 90.2 | 90.6 | 89.0 | 82.8 | 85.9 | 86.8 | 83.0 | 84.1 | 79.3 | 84.6 | 87.4
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|1990                                                                                                                              | 91.5 | 90.4 | 89.7 | 87.7 | 85.8 | 88.1 | 86.1 | 85.2 | 85.0 | 79.3 | 86.3 | 86.4
|1991                                                                                                                              | 91.0 | 91.7 | 88.5 | 87.4 | 87.4 | 86.8 | 84.7 | 84.0 | 82.9 | 73.6 | 85.1 | 87.5
|1992                                                                                                                              | 89.4 | 89.0 | 87.1 | 85.2 | 83.1 | 80.2 | 81.0 | 82.4 | 80.2 | 77.9 | 82.2 | 88.3
|1993                                                                                                                              | 89.4 | 89.9 | 91.0 | 87.9 | 87.4 | 82.3 | 82.8 | 81.3 | 79.2 | 77.7 | 81.5 | 87.8
|1994                                                                                                                              | 87.8 | 88.6 | 88.1 | 85.9 | 83.2 | 82.7 | 84.2 | 80.1 | 80.6 | 79.4 | 84.1 | 87.6
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|1995                                                                                                                              | 89.7 | 89.1 | 86.5 | 85.5 | 86.0 | 85.3 | 83.7 | 82.5 | 80.4 | 77.1 | 85.9 | 85.5
|1996                                                                                                                              | 88.8 | 90.1 | 88.2 | 87.2 | 85.7 | 86.0 | 82.4 | 81.9 | 80.0 | 77.3 | 84.9 | 87.6
|1997                                                                                                                              | 87.8 | 89.7 | 87.7 | 86.1 | 86.4 | 83.3 | 83.1 | 82.8 | 82.5 | 76.4 | 83.1 | 86.9
|1998                                                                                                                              | 90.2 | 88.9 | 88.3 | 86.7 | 85.7 | 85.6 | 84.2 | 83.3 | 80.6 | 75.3 | 83.9 | 86.1
|1999                                                                                                                              | 89.4 | 88.7 | 87.7 | 86.9 | 85.4 | 83.2 | 83.6 | 81.9 | 80.3 | 78.9 | 82.4 | 85.8
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|2000                                                                                                                              | 89.5 | 89.4 | 88.0 | 88.0 | 83.5 | 84.4 | 83.3 | 81.9 | 80.6 | 76.4 | 83.2 | 87.9
|2001                                                                                                                              | 89.1 | 90.5 | 88.8 | 85.5 | 86.1 | 82.6 | 79.0 | 79.3 | 81.7 | 76.3 | 83.3 | 86.6
|2002                                                                                                                              | 86.5 | 85.6 | 83.3 | 81.4 | 85.8 | 83.8 | 83.3 | 87.3 | 85.9 | 83.5 | 90.1 | 91.1
|2003                                                                                                                              | 87.8 | 87.5 | 88.2 | 85.7 | 85.3 | 82.4 | 80.1 | 78.3 | 77.9 | 74.0 | 82.4 | 87.9
|2004                                                                                                                              | 89.1 | 89.0 | 88.3 | 84.1 | 81.9 | 81.5 | 77.7 | 80.3 | 80.3 | 77.1 | 82.8 | 88.0
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|2005                                                                                                                              | 88.4 | 89.0 | 86.9 | 86.7 | 82.6 | 81.8 | 81.1 | 78.0 | 80.4 | 76.8 | 81.6 | 88.1
|2006                                                                                                                              | 88.8 | 88.9 | 87.9 | 87.2 | 81.8 | 83.1 | 79.4 | 78.8 | 78.2 | 77.0 | 82.5 | 89.0
|2007                                                                                                                              | 88.2 | 90.1 | 87.3 | 84.1 | 78.3 | 76.8 | 74.9 | 71.7 | 74.4 | 81.0 | 84.6 | 87.5
|2008                                                                                                                              | 88.2 | 89.8 | 87.0 | 86.1 | 83.7 | 83.4 | 78.7 | 77.2 | 78.4 | 82.8 | 84.1 | 87.9
|2009                                                                                                                              | 88.4 | 86.8 | 84.8 | 81.2 | 76.7 | 74.2 | 73.0 | 73.4 | 75.5 | 79.8 | 84.4 | 87.4
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|2010                                                                                                                              | 85.7 | 84.6 | 83.5 | 80.5 | 76.5 | 73.6 | 69.1 | 70.4 | 77.1 | 78.5 | 84.0 | 86.6
|2011                                                                                                                              | 86.5 | 86.5 | 83.2 | 79.6 | 72.3 | 72.0 | 67.4 | 68.3 | 74.3 | 75.0 | 84.0 | 83.2
|2012                                                                                                                              | 84.8 | 82.7 | 79.7 | 73.9 | 66.6 | 61.1 | 66.7 | 64.5 | 67.6 | 75.3 | 74.8 | 82.7
|2013                                                                                                                              | 85.7 | 82.0 | 78.6 | 74.3 | 62.4 | 61.8 | 57.7 | 57.6 | 66.6 | 72.7 | 79.5 | 84.8
|2014                                                                                                                              | 84.0 | 82.1 | 78.6 | 73.9 | 62.0 | 61.6 | 62.9 | 61.1 | 64.8 | 72.3 | 81.1 | 82.5
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|2015                                                                                                                              | 82.6 | 79.7 | 76.1 | 72.9 | 62.6 | 58.0 | 56.7 | 58.4 | 64.2 | 66.8 | 78.9 | 83.4
|2016                                                                                                                              | 83.3 | 80.3 | 76.5 | 67.4 | 62.4 | 59.8 | 58.9 | 61.4 | 59.6 | 67.1 | 75.5 | 85.4
|2017                                                                                                                              | 87.0 | 82.5 | 76.9 | 74.2 | 62.1 | 58.7 | 54.3 | 63.0 | 64.2 | 72.7 | 77.5 | 84.7
|2018                                                                                                                              | 82.6 | 83.8 | 80.0 | 74.8 | 61.2 | 62.2 | 58.7 | 59.0 | 61.5 | 70.6 | 79.3 | 84.0
|2019                                                                                                                              | 83.3 | 84.4 | 80.9 | 72.0 | 65.1 | 57.8 | 58.1 | 58.9 | 62.4 | 78.7 | 78.2 | 82.7
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|2020                                                                                                                              | 83.5 | 83.3 | 78.9 | 74.0 | 65.4 | 63.3 | 54.7 | 57.2 | 62.5 | 74.3 | 79.9 | 84.3
|2021                                                                                                                              | 82.9 | 83.8 | 80.3 | 73.4 | 66.8 | 56.5 | 58.5 | 56.8 | 63.3 | 74.4 | 78.9 | 83.4
|2022                                                                                                                              | 84.9 | 84.9 | 80.3 | 79.0 | 70.7 | 59.7 | 58.4 | 68.9 | 60.7 | 65.3 | 82.5 | 85.6
|2023                                                                                                                              | 84.7 | 84.6 | 83.5 | 78.5 | 65.7 | 60.1 | 58.1 | 55.0 | 54.7 | 76.3 | 77.4 | 83.1
|2024                                                                                                                              | 76.8 | 73.4 | 69.6 |      |      |      |      |      |      |      |      |     
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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: 5/31/2024                                                                                                          
|Next Release Date: 6/28/2024