年份 | 分类 | 数值 |
2000 | United States : cents per kilowatthour | 7.29 |
2001 | United States : cents per kilowatthour | 7.20 |
2002 | United States : cents per kilowatthour | 7.44 |
2003 | United States : cents per kilowatthour | 7.61 |
2004 | United States : cents per kilowatthour | 8.14 |
2005 | United States : cents per kilowatthour | 8.90 |
2006 | United States : cents per kilowatthour | 9.13 |
2007 | United States : cents per kilowatthour | 9.74 |
2008 | United States : cents per kilowatthour | 9.82 |
2009 | United States : cents per kilowatthour | 9.83 |
2010 | United States : cents per kilowatthour | 9.90 |
2011 | United States : cents per kilowatthour | 9.84 |
2012 | United States : cents per kilowatthour | 10.07 |
2013 | United States : cents per kilowatthour | 10.44 |
2014 | United States : cents per kilowatthour | 10.41 |
2015 | United States : cents per kilowatthour | 10.28 |