| Jan. | Feb. | Mar. | Apr. | May | June | July | Aug. | Sept. | Oct. | Nov. | Dec. | Q1 | Q2 | Q3 | Q4 | Annual | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Capacity (percent of 2007 output) |
|||||||||||||||||
| 1980 | 61.3 | 61.4 | 61.5 | 61.7 | 61.8 | 61.9 | 62.1 | 62.2 | 62.3 | 62.5 | 62.6 | 62.8 | 61.4 | 61.8 | 62.2 | 62.6 | 62.0 |
| 1981 | 62.9 | 63.1 | 63.2 | 63.4 | 63.5 | 63.7 | 63.8 | 64.0 | 64.1 | 64.2 | 64.4 | 64.5 | 63.1 | 63.5 | 64.0 | 64.4 | 63.7 |
| 1982 | 64.7 | 64.8 | 65.0 | 65.1 | 65.2 | 65.3 | 65.4 | 65.5 | 65.6 | 65.7 | 65.7 | 65.8 | 64.8 | 65.2 | 65.5 | 65.7 | 65.3 |
| 1983 | 65.8 | 65.9 | 65.9 | 65.9 | 65.9 | 66.0 | 66.0 | 66.0 | 66.1 | 66.1 | 66.1 | 66.2 | 65.9 | 65.9 | 66.0 | 66.2 | 66.0 |
| 1984 | 66.3 | 66.4 | 66.5 | 66.6 | 66.7 | 66.8 | 66.9 | 67.1 | 67.2 | 67.4 | 67.6 | 67.7 | 66.4 | 66.7 | 67.1 | 67.6 | 66.9 |
| 1985 | 67.9 | 68.1 | 68.3 | 68.4 | 68.6 | 68.8 | 68.9 | 69.1 | 69.2 | 69.3 | 69.4 | 69.5 | 68.1 | 68.6 | 69.1 | 69.4 | 68.8 |
| 1986 | 69.6 | 69.7 | 69.8 | 69.8 | 69.9 | 69.9 | 70.0 | 70.1 | 70.1 | 70.2 | 70.3 | 70.4 | 69.7 | 69.9 | 70.1 | 70.3 | 70.0 |
| 1987 | 70.5 | 70.7 | 70.8 | 70.9 | 71.1 | 71.2 | 71.4 | 71.5 | 71.6 | 71.8 | 71.9 | 71.9 | 70.7 | 71.1 | 71.5 | 71.9 | 71.3 |
| 1988 | 72.0 | 72.1 | 72.1 | 72.1 | 72.2 | 72.2 | 72.2 | 72.3 | 72.3 | 72.4 | 72.4 | 72.5 | 72.1 | 72.2 | 72.3 | 72.4 | 72.2 |
| 1989 | 72.6 | 72.7 | 72.8 | 72.9 | 73.0 | 73.2 | 73.3 | 73.5 | 73.7 | 73.8 | 74.0 | 74.1 | 72.7 | 73.1 | 73.5 | 74.0 | 73.3 |
| 1990 | 74.3 | 74.5 | 74.6 | 74.8 | 74.9 | 75.1 | 75.2 | 75.4 | 75.5 | 75.6 | 75.8 | 75.9 | 74.5 | 74.9 | 75.4 | 75.8 | 75.1 |
| 1991 | 76.0 | 76.1 | 76.2 | 76.3 | 76.4 | 76.5 | 76.6 | 76.7 | 76.7 | 76.8 | 76.9 | 77.0 | 76.1 | 76.4 | 76.7 | 76.9 | 76.5 |
| 1992 | 77.1 | 77.3 | 77.4 | 77.5 | 77.7 | 77.9 | 78.0 | 78.2 | 78.4 | 78.6 | 78.7 | 78.9 | 77.3 | 77.7 | 78.2 | 78.7 | 78.0 |
| 1993 | 79.0 | 79.1 | 79.3 | 79.4 | 79.5 | 79.6 | 79.7 | 79.8 | 79.9 | 80.0 | 80.2 | 80.3 | 79.1 | 79.5 | 79.8 | 80.2 | 79.6 |
| 1994 | 80.5 | 80.6 | 80.8 | 81.0 | 81.3 | 81.5 | 81.7 | 82.0 | 82.3 | 82.5 | 82.8 | 83.1 | 80.6 | 81.3 | 82.0 | 82.8 | 81.7 |
| 1995 | 83.4 | 83.7 | 84.0 | 84.3 | 84.6 | 84.9 | 85.2 | 85.5 | 85.9 | 86.2 | 86.6 | 86.9 | 83.7 | 84.6 | 85.5 | 86.6 | 85.1 |
| 1996 | 87.3 | 87.7 | 88.1 | 88.5 | 88.9 | 89.3 | 89.7 | 90.1 | 90.5 | 91.0 | 91.4 | 91.8 | 87.7 | 88.9 | 90.1 | 91.4 | 89.5 |
| 1997 | 92.3 | 92.7 | 93.2 | 93.7 | 94.2 | 94.7 | 95.3 | 95.8 | 96.4 | 97.0 | 97.6 | 98.3 | 92.7 | 94.2 | 95.8 | 97.6 | 95.1 |
| 1998 | 98.9 | 99.6 | 100.2 | 100.9 | 101.5 | 102.1 | 102.7 | 103.3 | 103.8 | 104.3 | 104.8 | 105.3 | 99.6 | 101.5 | 103.3 | 104.8 | 102.3 |
| 1999 | 105.8 | 106.2 | 106.7 | 107.1 | 107.5 | 108.0 | 108.4 | 108.8 | 109.2 | 109.6 | 110.0 | 110.4 | 106.2 | 107.5 | 108.8 | 110.0 | 108.1 |
| 2000 | 110.8 | 111.2 | 111.6 | 112.0 | 112.4 | 112.7 | 113.1 | 113.5 | 113.8 | 114.2 | 114.5 | 114.9 | 111.2 | 112.4 | 113.5 | 114.5 | 112.9 |
| 2001 | 115.2 | 115.5 | 115.9 | 116.2 | 116.5 | 116.8 | 117.1 | 117.4 | 117.7 | 118.0 | 118.2 | 118.4 | 115.5 | 116.5 | 117.4 | 118.2 | 116.9 |
| 2002 | 118.7 | 118.8 | 119.0 | 119.1 | 119.3 | 119.3 | 119.4 | 119.4 | 119.4 | 119.4 | 119.4 | 119.3 | 118.8 | 119.2 | 119.4 | 119.4 | 119.2 |
| 2003 | 119.3 | 119.2 | 119.1 | 119.1 | 119.0 | 118.9 | 118.9 | 118.8 | 118.8 | 118.7 | 118.7 | 118.7 | 119.2 | 119.0 | 118.8 | 118.7 | 118.9 |
| 2004 | 118.6 | 118.6 | 118.6 | 118.5 | 118.5 | 118.5 | 118.4 | 118.4 | 118.4 | 118.4 | 118.4 | 118.4 | 118.6 | 118.5 | 118.4 | 118.4 | 118.5 |
| 2005 | 118.4 | 118.5 | 118.5 | 118.6 | 118.7 | 118.8 | 118.9 | 119.0 | 119.1 | 119.3 | 119.4 | 119.5 | 118.5 | 118.7 | 119.0 | 119.4 | 118.9 |
| 2006 | 119.7 | 119.8 | 120.0 | 120.1 | 120.3 | 120.5 | 120.7 | 120.9 | 121.1 | 121.3 | 121.5 | 121.8 | 119.8 | 120.3 | 120.9 | 121.5 | 120.6 |
| 2007 | 122.0 | 122.2 | 122.5 | 122.7 | 122.9 | 123.1 | 123.3 | 123.4 | 123.5 | 123.6 | 123.7 | 123.7 | 122.2 | 122.9 | 123.4 | 123.6 | 123.0 |
| 2008 | 123.7 | 123.8 | 123.8 | 123.9 | 123.9 | 124.0 | 124.1 | 124.2 | 124.3 | 124.5 | 124.7 | 124.8 | 123.8 | 123.9 | 124.2 | 124.7 | 124.1 |
| 2009 | 125.0 | 125.1 | 125.2 | 125.3 | 125.4 | 125.4 | 125.4 | 125.4 | 125.4 | 125.3 | 125.2 | 125.2 | 125.1 | 125.4 | 125.4 | 125.2 | 125.3 |
| 2010 | 125.1 | 125.0 | 125.0 | 124.9 | 124.8 | 125.0 | |||||||||||
| Utilization (percent) |
|||||||||||||||||
| 1980 | 84.3 | 84.2 | 83.7 | 81.9 | 79.7 | 78.5 | 77.8 | 77.9 | 79.0 | 79.8 | 81.0 | 81.3 | 84.1 | 80.0 | 78.2 | 80.7 | 80.8 |
| 1981 | 80.6 | 80.0 | 80.3 | 79.8 | 80.1 | 80.3 | 80.6 | 80.4 | 79.7 | 79.0 | 77.9 | 76.9 | 80.3 | 80.0 | 80.2 | 77.9 | 79.6 |
| 1982 | 75.2 | 76.5 | 75.8 | 75.0 | 74.4 | 74.0 | 73.6 | 72.9 | 72.5 | 71.8 | 71.5 | 70.9 | 75.8 | 74.4 | 73.0 | 71.4 | 73.7 |
| 1983 | 72.2 | 71.7 | 72.3 | 73.2 | 73.7 | 74.0 | 75.2 | 76.0 | 77.1 | 77.7 | 77.8 | 78.2 | 72.1 | 73.6 | 76.1 | 77.9 | 74.9 |
| 1984 | 79.6 | 80.0 | 80.2 | 80.5 | 80.8 | 80.9 | 81.0 | 80.9 | 80.6 | 80.3 | 80.4 | 80.3 | 79.9 | 80.8 | 80.8 | 80.3 | 80.5 |
| 1985 | 79.8 | 80.0 | 79.9 | 79.5 | 79.4 | 79.3 | 78.6 | 78.7 | 78.9 | 78.5 | 78.6 | 79.3 | 79.9 | 79.4 | 78.7 | 78.8 | 79.2 |
| 1986 | 79.6 | 78.9 | 78.4 | 78.3 | 78.4 | 78.1 | 78.5 | 78.3 | 78.3 | 78.6 | 78.9 | 79.5 | 79.0 | 78.3 | 78.4 | 79.0 | 78.7 |
| 1987 | 79.0 | 79.9 | 79.9 | 80.2 | 80.6 | 80.8 | 81.2 | 81.6 | 81.7 | 82.8 | 83.1 | 83.4 | 79.6 | 80.6 | 81.5 | 83.1 | 81.2 |
| 1988 | 83.4 | 83.6 | 83.8 | 84.2 | 84.1 | 84.3 | 84.4 | 84.7 | 84.4 | 84.8 | 84.8 | 85.1 | 83.6 | 84.2 | 84.5 | 84.9 | 84.3 |
| 1989 | 85.2 | 84.7 | 84.8 | 84.7 | 84.0 | 83.8 | 82.9 | 83.5 | 83.1 | 82.8 | 82.9 | 83.2 | 84.9 | 84.2 | 83.1 | 83.0 | 83.8 |
| 1990 | 82.6 | 83.2 | 83.4 | 83.1 | 83.1 | 83.1 | 82.9 | 82.9 | 83.0 | 82.2 | 81.1 | 80.4 | 83.0 | 83.1 | 82.9 | 81.2 | 82.6 |
| 1991 | 79.9 | 79.3 | 78.7 | 78.8 | 79.5 | 80.2 | 80.1 | 80.1 | 80.7 | 80.4 | 80.3 | 79.9 | 79.3 | 79.5 | 80.3 | 80.2 | 79.8 |
| 1992 | 79.3 | 79.7 | 80.3 | 80.7 | 80.8 | 80.6 | 81.1 | 80.5 | 80.5 | 80.9 | 81.1 | 81.0 | 79.8 | 80.7 | 80.7 | 81.0 | 80.5 |
| 1993 | 81.2 | 81.4 | 81.2 | 81.4 | 81.0 | 81.1 | 81.2 | 81.1 | 81.4 | 81.9 | 82.1 | 82.3 | 81.3 | 81.1 | 81.2 | 82.1 | 81.4 |
| 1994 | 82.5 | 82.3 | 83.0 | 83.2 | 83.4 | 83.7 | 83.6 | 83.8 | 83.8 | 84.2 | 84.4 | 85.1 | 82.6 | 83.5 | 83.7 | 84.6 | 83.6 |
| 1995 | 85.0 | 84.7 | 84.6 | 84.2 | 84.0 | 84.0 | 83.3 | 84.2 | 84.2 | 83.6 | 83.5 | 83.5 | 84.8 | 84.1 | 83.9 | 83.5 | 84.1 |
| 1996 | 82.6 | 83.6 | 83.1 | 83.4 | 83.5 | 83.9 | 83.4 | 83.6 | 83.7 | 83.3 | 83.6 | 83.7 | 83.1 | 83.6 | 83.6 | 83.5 | 83.4 |
| 1997 | 83.4 | 84.0 | 84.2 | 83.8 | 83.9 | 83.8 | 83.8 | 84.5 | 84.7 | 84.7 | 85.0 | 84.7 | 83.9 | 83.9 | 84.3 | 84.8 | 84.2 |
| 1998 | 84.5 | 84.1 | 83.6 | 83.4 | 83.4 | 82.5 | 81.7 | 83.0 | 82.3 | 82.5 | 82.0 | 81.9 | 84.1 | 83.1 | 82.3 | 82.1 | 82.9 |
| 1999 | 81.9 | 81.9 | 81.8 | 81.6 | 81.9 | 81.4 | 81.6 | 81.7 | 81.1 | 81.9 | 82.0 | 82.3 | 81.9 | 81.6 | 81.5 | 82.0 | 81.8 |
| 2000 | 82.1 | 82.1 | 82.1 | 82.4 | 82.2 | 82.0 | 81.5 | 81.1 | 81.2 | 80.7 | 80.4 | 79.9 | 82.1 | 82.2 | 81.3 | 80.3 | 81.5 |
| 2001 | 79.1 | 78.4 | 77.9 | 77.5 | 76.8 | 76.1 | 75.6 | 75.1 | 74.7 | 74.2 | 73.6 | 73.5 | 78.5 | 76.8 | 75.1 | 73.8 | 76.0 |
| 2002 | 73.8 | 73.7 | 74.1 | 74.4 | 74.7 | 75.3 | 75.0 | 75.1 | 75.2 | 75.0 | 75.3 | 75.0 | 73.9 | 74.8 | 75.1 | 75.1 | 74.7 |
| 2003 | 75.6 | 75.9 | 75.8 | 75.2 | 75.3 | 75.4 | 75.7 | 75.7 | 76.1 | 76.2 | 76.8 | 76.8 | 75.7 | 75.3 | 75.8 | 76.6 | 75.9 |
| 2004 | 77.0 | 77.4 | 77.0 | 77.4 | 78.0 | 77.3 | 77.8 | 78.0 | 78.0 | 78.7 | 78.9 | 79.4 | 77.1 | 77.6 | 78.0 | 79.0 | 77.9 |
| 2005 | 79.8 | 80.3 | 80.2 | 80.2 | 80.4 | 80.5 | 80.4 | 80.4 | 78.7 | 79.5 | 80.3 | 80.6 | 80.1 | 80.4 | 79.8 | 80.1 | 80.1 |
| 2006 | 80.6 | 80.5 | 80.6 | 80.8 | 80.6 | 80.9 | 81.0 | 81.0 | 80.8 | 80.6 | 80.3 | 81.0 | 80.6 | 80.8 | 80.9 | 80.7 | 80.7 |
| 2007 | 80.6 | 81.3 | 81.3 | 81.7 | 81.6 | 81.3 | 81.4 | 81.3 | 81.5 | 80.9 | 81.2 | 81.2 | 81.1 | 81.5 | 81.4 | 81.1 | 81.3 |
| 2008 | 80.9 | 80.7 | 80.5 | 79.8 | 79.4 | 79.0 | 79.0 | 77.9 | 74.8 | 75.4 | 74.5 | 72.9 | 80.7 | 79.4 | 77.2 | 74.3 | 77.9 |
| 2009 | 71.3 | 70.7 | 69.6 | 69.0 | 68.3 | 68.2 | 69.1 | 70.0 | 70.5 | 70.7 | 71.1 | 71.6 | 70.5 | 68.5 | 69.9 | 71.1 | 70.0 |
| 2010 | 72.3 | 72.4 | 72.7 | 73.1 | 74.1 | 72.5 | |||||||||||
Note: Estimates from January 2010 through May 2010 are subject to further revision in the upcoming monthly releases.