| 年份 | 类型 | 数值(美分每千瓦时) |
| 2001 | United States : all sectors | 7.29 |
| 2002 | United States : all sectors | 7.20 |
| 2003 | United States : all sectors | 7.44 |
| 2004 | United States : all sectors | 7.61 |
| 2005 | United States : all sectors | 8.14 |
| 2006 | United States : all sectors | 8.90 |
| 2007 | United States : all sectors | 9.13 |
| 2008 | United States : all sectors | 9.74 |
| 2009 | United States : all sectors | 9.82 |
| 2010 | United States : all sectors | 9.83 |
| 2011 | United States : all sectors | 9.90 |
| 2012 | United States : all sectors | 9.84 |
| 2013 | United States : all sectors | 10.07 |
| 2014 | United States : all sectors | 10.44 |
| 2015 | United States : all sectors | 10.41 |
| 2016 | United States : all sectors | 10.27 |
| 2017 | United States : all sectors | 10.54 |