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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 Iowa Represented by the Price  (Percent)
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|Percent of Commercial Natural Gas Deliveries in Iowa Represented by the Price  (Percent)
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|Year                                                                                                                              | Jan  | Feb  | Mar  | Apr  | May  | Jun  | Jul  | Aug  | Sep  | Oct  | Nov  | Dec 
|--------------------------------------------------------------------------------------------------------------------------------- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ---- | ----
|1989                                                                                                                              | 98.4 | 98.4 | 98.5 | 98.0 | 97.0 | 96.3 | 95.4 | 95.0 | 95.2 | 96.6 | 97.6 | 98.3
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|1990                                                                                                                              | 98.5 | 98.2 | 98.1 | 97.8 | 97.3 | 96.3 | 95.3 | 95.6 | 92.3 | 95.5 | 97.5 | 97.7
|1991                                                                                                                              | 98.4 | 98.4 | 98.2 | 97.3 | 96.7 | 95.7 | 94.9 | 91.5 | 96.0 | 96.3 | 98.5 | 98.0
|1992                                                                                                                              | 97.6 | 97.4 | 96.5 | 96.2 | 94.3 | 93.2 | 91.3 | 90.6 | 88.7 | 91.0 | 96.1 | 96.7
|1993                                                                                                                              | 96.6 | 96.6 | 95.8 | 96.4 | 92.9 | 90.8 | 90.2 | 88.3 | 88.9 | 92.8 | 95.2 | 93.2
|1994                                                                                                                              | 92.9 | 94.3 | 91.2 | 90.5 | 87.9 | 84.1 | 81.3 | 80.0 | 80.5 | 86.0 | 90.4 | 91.0
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|1995                                                                                                                              | 91.7 | 92.0 | 91.1 | 88.8 | 86.1 | 81.9 | 80.0 | 77.7 | 80.7 | 86.9 | 89.6 | 91.2
|1996                                                                                                                              | 90.5 | 92.0 | 88.3 | 85.8 | 85.9 | 86.6 | 77.2 | 92.2 | 77.0 | 81.8 | 86.6 | 87.2
|1997                                                                                                                              | 91.1 | 90.7 | 89.0 | 93.5 | 83.8 | 92.8 | 75.8 | 85.1 | 77.9 | 80.1 | 85.0 | 89.4
|1998                                                                                                                              | 88.3 | 89.6 | 87.3 | 84.4 | 88.9 | 73.6 | 72.4 | 82.1 | 77.0 | 77.4 | 84.0 | 89.4
|1999                                                                                                                              | 86.9 | 84.9 | 87.5 | 77.5 | 93.7 | 76.7 | 72.6 | 75.3 | 71.9 | 79.7 | 83.2 | 83.7
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|2000                                                                                                                              | 87.1 | 86.0 | 84.2 | 79.3 | 54.5 | 68.9 | 71.5 | 77.7 | 71.7 | 77.2 | 82.2 | 84.2
|2001                                                                                                                              | 92.8 | 85.4 | 83.7 | 77.9 | 70.5 | 72.2 | 71.6 | 82.2 | 60.9 | 73.4 | 76.5 | 82.6
|2002                                                                                                                              | 83.5 | 83.1 | 81.2 | 83.7 | 78.3 | 68.3 | 65.3 | 72.4 | 53.0 | 89.9 | 89.2 | 83.5
|2003                                                                                                                              | 81.4 | 79.9 | 80.4 | 76.8 | 72.5 | 73.4 | 72.3 | 69.6 | 72.2 | 72.6 | 77.2 | 78.8
|2004                                                                                                                              | 80.0 | 77.8 | 78.1 | 71.2 | 70.9 | 69.4 | 66.0 | 68.9 | 68.3 | 78.7 | 84.0 | 87.5
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|2005                                                                                                                              | 86.2 | 83.8 | 82.2 | 66.4 | 77.6 | 60.9 | 66.2 | 66.1 | 62.8 | 72.7 | 77.4 | 81.9
|2006                                                                                                                              | 79.7 | 81.6 | 80.9 | 69.5 | 72.6 | 67.1 | 67.9 | 67.8 | 67.7 | 76.8 | 80.1 | 81.3
|2007                                                                                                                              | 82.9 | 82.3 | 78.7 | 77.0 | 66.5 | 68.8 | 65.4 | 64.4 | 65.6 | 71.9 | 79.9 | 80.4
|2008                                                                                                                              | 83.7 | 80.8 | 78.4 | 71.8 | 74.5 | 71.4 | 69.8 | 68.7 | 51.6 | 61.7 | 73.0 | 79.1
|2009                                                                                                                              | 77.8 | 78.9 | 76.5 | 74.4 | 66.5 | 57.7 | 56.6 | 55.3 | 52.6 | 67.0 | 70.3 | 77.1
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|2010                                                                                                                              | 77.3 | 80.5 | 76.6 | 67.1 | 70.2 | 53.5 | 50.6 | 48.1 | 51.6 | 59.4 | 66.9 | 81.9
|2011                                                                                                                              | 78.3 | 78.6 | 76.6 | 74.5 | 69.2 | 64.0 | 61.4 | 58.8 | 61.7 | 61.2 | 66.6 | 70.4
|2012                                                                                                                              | 77.0 | 76.9 | 70.2 | 64.8 | 51.6 | 61.2 | 58.2 | 60.9 | 68.5 | 76.6 | 75.6 | 79.0
|2013                                                                                                                              | 76.4 | 74.9 | 74.2 | 70.1 | 66.2 | 62.2 | 59.7 | 54.3 | 57.9 | 73.3 | 77.6 | 75.7
|2014                                                                                                                              | 77.8 | 77.2 | 76.6 | 71.5 | 67.2 | 64.0 | 63.5 | 61.7 | 62.6 | 72.0 | 78.0 | 75.8
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|2015                                                                                                                              | 76.3 | 76.5 | 71.3 | 66.0 | 61.7 | 57.8 | 59.0 | 55.5 | 59.3 | 67.1 | 70.4 | 75.2
|2016                                                                                                                              | 76.8 | 75.0 | 69.6 | 69.6 | 61.9 | 57.1 | 53.6 | 48.9 | 59.2 | 65.8 | 69.1 | 73.9
|2017                                                                                                                              | 74.7 | 73.3 | 71.5 | 64.9 | 61.1 | 52.8 | 51.8 | 54.8 | 54.0 | 67.6 | 70.3 | 72.2
|2018                                                                                                                              | 70.8 | 70.9 | 69.4 | 67.5 | 52.3 | 48.0 | 46.4 | 50.6 | 50.5 | 64.6 | 69.9 | 68.4
|2019                                                                                                                              | 71.9 | 71.4 | 70.2 | 62.6 | 56.2 | 54.2 | 49.6 | 44.5 | 47.3 | 66.0 | 71.9 | 71.5
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|2020                                                                                                                              | 70.4 | 69.9 | 65.6 | 61.1 | 53.6 | 46.5 | 40.7 | 46.3 | 52.5 | 66.0 | 64.0 | 69.8
|2021                                                                                                                              | 71.0 | 72.2 | 65.2 | 61.7 | 54.7 | 47.6 | 43.1 | 43.9 | 49.9 | 60.4 | 63.9 | 66.4
|2022                                                                                                                              | 70.0 | 69.0 | 65.2 | 61.7 | 53.1 | 45.5 | 38.9 | 39.1 | 44.2 | 62.2 | 65.2 | 66.8
|2023                                                                                                                              | 68.2 | 67.6 | 66.4 | 60.1 | 47.9 | 43.8 | 38.9 | 39.3 | 46.1 | 57.8 | 60.0 | 65.6
|2024                                                                                                                              | 68.6 | 63.9 | 62.3 | 58.5 | 46.8 |      |      |      |      |      |      |     
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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