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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 Montana Represented by the Price  (Percent)
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|Percent of Commercial Natural Gas Deliveries in Montana Represented by the Price  (Percent)
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|Year                                                                                                                              | Jan  | Feb  | Mar  | Apr  | May  | Jun  | Jul  | Aug  | Sep  | Oct  | Nov  | Dec 
|--------------------------------------------------------------------------------------------------------------------------------- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ----
|1989                                                                                                                              | 98.3 | 98.9 | 98.8 | 98.6 | 97.4 | 96.8 | 96.4 | 96.3 | 96.3 | 97.5 | 97.9 | 98.1
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|1990                                                                                                                              | 97.9 | 97.8 | 97.6 | 98.6 | 96.9 | 98.4 | 96.3 | 95.8 | 93.3 | 96.9 | 97.6 | 99.6
|1991                                                                                                                              | 98.5 | 98.1 | 98.0 | 97.7 | 97.8 | 96.9 | 95.8 | 95.8 | 95.8 | 96.3 | 96.5 | 97.2
|1992                                                                                                                              | 97.1 | 98.0 | 96.7 | 96.5 | 96.6 | 94.9 | 95.4 | 96.8 | 90.6 | 92.0 | 92.8 | 94.6
|1993                                                                                                                              | 95.4 | 94.0 | 94.9 | 93.9 | 94.9 | 91.1 | 91.2 | 91.2 | 87.5 | 88.8 | 91.5 | 93.5
|1994                                                                                                                              | 92.7 | 93.0 | 92.7 | 91.8 | 91.9 | 89.6 | 88.7 | 87.8 | 87.5 | 89.0 | 91.2 | 93.1
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|1995                                                                                                                              | 93.0 | 92.5 | 92.5 | 91.9 | 92.0 | 90.1 | 89.6 | 88.9 | 88.2 | 88.8 | 91.8 | 91.9
|1996                                                                                                                              | 92.2 | 93.7 | 91.9 | 92.6 | 90.8 | 90.8 | 87.8 | 87.2 | 86.1 | 87.5 | 91.6 | 92.7
|1997                                                                                                                              | 93.5 | 93.1 | 92.0 | 91.3 | 90.4 | 88.9 | 90.6 | 87.6 | 85.8 | 88.2 | 90.6 | 92.3
|1998                                                                                                                              | 86.4 | 80.5 | 80.5 | 76.4 | 72.1 | 66.7 | 67.7 | 68.6 | 64.2 | 70.5 | 74.9 | 77.0
|1999                                                                                                                              | 84.5 | 80.5 | 80.4 | 78.1 | 75.6 | 65.3 | 70.1 | 68.5 | 75.4 | 80.1 | 82.0 | 85.5
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|2000                                                                                                                              | 72.5 | 76.6 | 74.8 | 67.7 | 63.5 | 60.0 | 65.8 | 65.1 | 68.7 | 73.3 | 78.3 | 81.7
|2001                                                                                                                              | 76.4 | 84.8 | 61.8 | 75.2 | 68.7 | 69.1 | 68.7 | 69.9 | 67.7 | 75.1 | 75.4 | 81.5
|2002                                                                                                                              | 74.3 | 73.4 | 81.6 | 73.1 | 69.5 | 65.7 | 66.6 | 69.5 | 66.9 | 76.7 | 76.9 | 81.7
|2003                                                                                                                              | 77.0 | 74.2 | 75.5 | 65.6 | 64.2 | 58.6 | 59.9 | 59.8 | 46.8 | 49.5 | 70.3 | 74.5
|2004                                                                                                                              | 82.3 | 84.2 | 80.1 | 69.6 | 71.7 | 68.9 | 68.3 | 58.8 | 61.5 | 62.0 | 76.0 | 81.3
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|2005                                                                                                                              | 84.6 | 83.0 | 82.6 | 75.3 | 68.2 | 66.2 | 72.8 | 62.8 | 64.8 | 66.4 | 75.7 | 81.9
|2006                                                                                                                              | 84.9 | 81.4 | 83.6 | 81.0 | 79.1 | 57.9 | 56.1 | 53.0 | 66.9 | 72.1 | 73.3 | 80.5
|2007                                                                                                                              | 80.9 | 81.1 | 78.9 | 78.3 | 84.0 | 84.1 | 57.6 | 56.1 | 62.8 | 75.3 | 78.6 | 84.2
|2008                                                                                                                              | 79.8 | 78.7 | 74.3 | 81.5 | 85.9 | 76.6 | 74.3 | 65.2 | 65.7 | 75.6 | 89.2 | 85.7
|2009                                                                                                                              | 52.2 | 53.5 | 48.4 | 54.6 | 52.6 | 45.3 | 37.4 | 39.7 | 42.6 | 42.7 | 51.0 | 47.7
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|2010                                                                                                                              | 59.6 | 58.4 | 55.2 | 57.7 | 55.9 | 55.5 | 47.5 | 43.8 | 45.9 | 44.4 | 48.7 | 56.0
|2011                                                                                                                              | 58.7 | 55.3 | 54.9 | 47.6 | 50.2 | 49.3 | 55.6 | 45.7 | 44.6 | 53.6 | 50.3 | 55.6
|2012                                                                                                                              | 54.6 | 55.3 | 53.7 | 58.7 | 54.0 | 55.1 | 49.3 | 47.4 | 44.0 | 44.0 | 53.0 | 51.5
|2013                                                                                                                              | 56.1 | 56.1 | 52.4 | 56.2 | 56.5 | 53.2 | 51.9 | 46.4 | 43.5 | 47.8 | 49.6 | 54.5
|2014                                                                                                                              | 56.5 | 55.2 | 56.3 | 58.6 | 57.3 | 50.8 | 50.8 | 46.1 | 46.1 | 43.8 | 48.2 | 53.4
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|2015                                                                                                                              | 56.8 | 53.8 | 53.7 | 54.9 | 53.0 | 53.1 | 48.3 | 49.7 | 44.3 | 43.4 | 47.2 | 53.9
|2016                                                                                                                              | 55.8 | 52.0 | 47.3 | 52.2 | 43.8 | 43.9 | 39.4 | 37.5 | 37.1 | 40.6 | 41.7 | 49.3
|2017                                                                                                                              | 55.8 | 55.4 | 51.3 | 50.4 | 49.2 | 43.6 | 40.0 | 37.2 | 37.9 | 44.1 | 47.3 | 48.4
|2018                                                                                                                              | 55.2 | 50.6 | 49.2 | 51.1 | 48.7 | 41.5 | 37.5 | 30.8 | 25.8 | 42.1 | 43.7 | 48.2
|2019                                                                                                                              | 51.6 | 54.3 | 56.7 | 50.5 | 44.4 | 38.5 | 30.9 | 27.4 | 24.8 | 39.0 | 49.2 | 49.9
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|2020                                                                                                                              | 51.0 | 51.2 | 54.0 | 52.6 | 38.7 | 29.3 | 33.2 | 27.4 | 27.0 | 43.1 | 49.3 | 50.3
|2021                                                                                                                              | 53.4 | 52.9 | 61.0 | 50.8 | 45.3 | 41.5 | 30.5 | 21.9 | 26.0 | 33.5 | 50.0 | 50.0
|2022                                                                                                                              | 57.3 | 54.1 | 60.2 | 52.1 | 51.0 | 45.3 | 30.5 | 31.8 | 33.6 | 31.2 | 44.4 | 52.0
|2023                                                                                                                              | 57.0 | 54.4 | 58.5 | 56.2 | 51.5 | 33.8 | 27.6 | 26.5 | 27.0 | 29.1 | 52.0 | 50.8
|2024                                                                                                                              | 53.3 | 56.2 | 56.2 | 56.8 | 51.2 |      |      |      |      |      |      |     
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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