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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 Washington Represented by the Price  (Percent)
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|Percent of Industrial Natural Gas Deliveries in Washington Represented by the Price  (Percent)
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|Year                                                                                                                              | Jan  | Feb  | Mar  | Apr  | May  | Jun  | Jul  | Aug  | Sep  | Oct  | Nov  | Dec 
|--------------------------------------------------------------------------------------------------------------------------------- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ----
|2001                                                                                                                              | 40.1 | 37.3 | 39.3 | 33.9 | 31.2 | 31.0 | 27.1 | 35.1 | 34.9 | 46.1 | 46.5 | 46.1
|2002                                                                                                                              | 25.9 | 28.6 | 29.4 | 32.8 | 30.0 | 24.4 | 27.5 | 20.7 | 24.7 | 25.4 | 31.6 | 26.9
|2003                                                                                                                              | 26.3 | 26.9 | 25.5 | 19.5 | 18.5 | 15.1 | 13.6 | 15.3 | 17.5 | 18.9 | 18.7 | 22.2
|2004                                                                                                                              | 20.9 | 21.0 | 21.4 | 19.1 | 15.8 | 16.0 | 13.2 | 17.1 | 15.0 | 16.2 | 14.5 | 15.6
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|2005                                                                                                                              | 15.1 | 14.4 | 15.2 | 12.9 | 11.7 | 11.7 | 11.0 | 15.0 | 15.5 | 18.8 | 20.6 | 25.3
|2006                                                                                                                              | 22.9 | 22.8 | 22.6 | 19.7 | 19.5 | 17.8 | 17.2 | 16.8 | 17.1 | 19.2 | 21.8 | 22.3
|2007                                                                                                                              | 23.5 | 22.4 | 23.2 | 18.7 | 16.9 | 14.7 | 15.1 | 14.5 | 14.2 | 14.4 | 13.9 | 16.5
|2008                                                                                                                              | 13.3 | 14.2 | 14.6 | 18.7 | 17.0 | 13.7 | 11.0 | 10.0 | 9.8  | 10.3 | 9.7  | 10.8
|2009                                                                                                                              | 11.6 | 11.9 | 11.3 | 9.3  | 8.5  | 6.5  | 6.3  | 5.8  | 5.5  | 7.8  | 8.2  | 10.2
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|2010                                                                                                                              | 10.3 | 10.9 | 8.7  | 9.4  | 7.4  | 7.6  | 6.8  | 6.4  | 6.5  | 7.1  | 7.2  | 10.0
|2011                                                                                                                              | 9.4  | 9.2  | 9.8  | 8.3  | 8.0  | 6.9  | 5.3  | 5.5  | 6.1  | 6.3  | 7.3  | 7.1 
|2012                                                                                                                              | 11.5 | 8.2  | 9.1  | 7.2  | 6.2  | 5.5  | 5.0  | 4.8  | 4.5  | 5.9  | 6.5  | 10.9
|2013                                                                                                                              | 8.8  | 8.5  | 7.7  | 7.1  | 5.9  | 4.0  | 5.1  | 2.9  | 5.1  | 5.5  | 6.8  | 10.8
|2014                                                                                                                              | 8.0  | 8.9  | 8.7  | 8.7  | 5.8  | 4.9  | 4.6  | 4.0  | 4.4  | 5.6  | 5.8  | 7.9 
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|2015                                                                                                                              | 7.1  | 7.6  | 7.0  | 6.8  | 5.2  | 4.8  | 4.3  | 4.2  | 4.9  | 5.7  | 6.2  | 8.7 
|2016                                                                                                                              | 8.2  | 7.6  | 7.8  | 6.2  | 5.3  | 4.3  | 4.2  | 4.5  | 4.9  | 5.4  | 6.6  | 8.0 
|2017                                                                                                                              | 9.0  | 8.5  | 7.9  | 7.0  | 5.3  | 4.8  | 4.3  | 3.9  | 5.3  | 5.7  | 6.6  | 7.4 
|2018                                                                                                                              | 7.8  | 7.4  | 7.6  | 6.7  | 4.6  | 5.0  | 3.2  | 4.8  | 4.0  | 5.6  | 7.4  | 10.4
|2019                                                                                                                              | 7.4  | 8.5  | 7.7  | 6.9  | 4.9  | 3.6  | 3.7  | 4.1  | 6.5  | 6.4  | 7.3  | 7.5 
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|2020                                                                                                                              | 8.2  | 6.2  | 7.2  | 6.4  | 4.4  | 5.2  | 4.6  | 3.6  | 6.9  | 6.0  | 7.0  | 7.4 
|2021                                                                                                                              | 6.7  | 7.9  | 8.4  | 6.0  | 5.1  | 5.2  | 3.8  | 4.6  | 4.3  | 6.2  | 6.9  | 8.3 
|2022                                                                                                                              | 8.5  | 7.8  | 7.4  | 6.2  | 5.3  | 5.4  | 4.3  | 4.3  | 4.6  | 5.5  | 7.9  | 9.5 
|2023                                                                                                                              | 9.5  | 10.6 | 9.6  | 7.7  | 5.5  | 5.3  | 4.3  | 4.9  | 4.8  | 5.5  | 7.3  | 7.4 
|2024                                                                                                                              | 8.3  | 7.4  | 7.0  | 6.9  | NA   |      |      |      |      |      |      |     
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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