| Jan. | Feb. | Mar. | Apr. | May | June | July | Aug. | Sept. | Oct. | Nov. | Dec. | Q1 | Q2 | Q3 | Q4 | Annual | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Capacity (percent of 2002 output) |
|||||||||||||||||
| 1979 | 67.1 | 67.3 | 67.4 | 67.6 | 67.8 | 67.9 | 68.1 | 68.2 | 68.4 | 68.5 | 68.6 | 68.8 | 67.3 | 67.8 | 68.2 | 68.6 | 68.0 |
| 1980 | 68.9 | 69.1 | 69.2 | 69.3 | 69.5 | 69.6 | 69.8 | 69.9 | 70.1 | 70.2 | 70.4 | 70.5 | 69.1 | 69.5 | 69.9 | 70.4 | 69.7 |
| 1981 | 70.7 | 70.9 | 71.0 | 71.2 | 71.4 | 71.5 | 71.7 | 71.9 | 72.1 | 72.2 | 72.4 | 72.6 | 70.9 | 71.4 | 71.9 | 72.4 | 71.6 |
| 1982 | 72.7 | 72.9 | 73.0 | 73.2 | 73.3 | 73.4 | 73.5 | 73.6 | 73.7 | 73.8 | 73.9 | 73.9 | 72.9 | 73.3 | 73.6 | 73.9 | 73.4 |
| 1983 | 74.0 | 74.0 | 74.0 | 74.1 | 74.1 | 74.1 | 74.1 | 74.2 | 74.2 | 74.2 | 74.3 | 74.4 | 74.0 | 74.1 | 74.2 | 74.3 | 74.1 |
| 1984 | 74.5 | 74.5 | 74.7 | 74.8 | 74.9 | 75.1 | 75.2 | 75.4 | 75.6 | 75.7 | 75.9 | 76.1 | 74.6 | 74.9 | 75.4 | 75.9 | 75.2 |
| 1985 | 76.3 | 76.5 | 76.7 | 76.9 | 77.1 | 77.2 | 77.4 | 77.6 | 77.7 | 77.8 | 78.0 | 78.1 | 76.5 | 77.1 | 77.6 | 78.0 | 77.3 |
| 1986 | 78.2 | 78.3 | 78.4 | 78.5 | 78.5 | 78.6 | 78.7 | 78.8 | 78.9 | 79.0 | 79.1 | 79.2 | 78.3 | 78.5 | 78.8 | 79.1 | 78.7 |
| 1987 | 79.3 | 79.5 | 79.6 | 79.8 | 79.9 | 80.1 | 80.2 | 80.4 | 80.5 | 80.6 | 80.7 | 80.8 | 79.5 | 79.9 | 80.4 | 80.7 | 80.1 |
| 1988 | 80.9 | 81.0 | 81.1 | 81.1 | 81.2 | 81.2 | 81.2 | 81.3 | 81.4 | 81.4 | 81.5 | 81.6 | 81.0 | 81.2 | 81.3 | 81.5 | 81.2 |
| 1989 | 81.7 | 81.8 | 82.0 | 82.1 | 82.3 | 82.4 | 82.6 | 82.8 | 82.9 | 83.1 | 83.3 | 83.5 | 81.8 | 82.3 | 82.8 | 83.3 | 82.5 |
| 1990 | 83.7 | 83.8 | 84.0 | 84.2 | 84.3 | 84.5 | 84.6 | 84.8 | 84.9 | 85.1 | 85.2 | 85.3 | 83.8 | 84.3 | 84.8 | 85.2 | 84.5 |
| 1991 | 85.5 | 85.6 | 85.7 | 85.8 | 85.9 | 86.0 | 86.1 | 86.2 | 86.3 | 86.5 | 86.6 | 86.7 | 85.6 | 85.9 | 86.2 | 86.6 | 86.1 |
| 1992 | 86.8 | 87.0 | 87.1 | 87.3 | 87.5 | 87.7 | 87.9 | 88.0 | 88.2 | 88.4 | 88.5 | 88.7 | 87.0 | 87.5 | 88.0 | 88.5 | 87.8 |
| 1993 | 88.8 | 89.0 | 89.1 | 89.2 | 89.3 | 89.4 | 89.5 | 89.6 | 89.7 | 89.9 | 90.1 | 90.2 | 89.0 | 89.3 | 89.6 | 90.1 | 89.5 |
| 1994 | 90.4 | 90.6 | 90.9 | 91.1 | 91.4 | 91.7 | 92.0 | 92.3 | 92.6 | 92.9 | 93.2 | 93.5 | 90.6 | 91.4 | 92.3 | 93.2 | 91.9 |
| 1995 | 93.9 | 94.2 | 94.5 | 94.8 | 95.1 | 95.5 | 95.8 | 96.2 | 96.5 | 96.9 | 97.3 | 97.7 | 94.2 | 95.1 | 96.2 | 97.3 | 95.7 |
| 1996 | 98.1 | 98.6 | 99.0 | 99.5 | 99.9 | 100.4 | 100.9 | 101.4 | 101.8 | 102.3 | 102.8 | 103.3 | 98.6 | 99.9 | 101.4 | 102.8 | 100.7 |
| 1997 | 103.8 | 104.3 | 104.9 | 105.4 | 106.0 | 106.6 | 107.2 | 107.8 | 108.5 | 109.1 | 109.8 | 110.5 | 104.3 | 106.0 | 107.8 | 109.8 | 107.0 |
| 1998 | 111.2 | 112.0 | 112.7 | 113.4 | 114.1 | 114.7 | 115.4 | 116.0 | 116.6 | 117.1 | 117.7 | 118.2 | 112.0 | 114.1 | 116.0 | 117.7 | 114.9 |
| 1999 | 118.8 | 119.3 | 119.8 | 120.3 | 120.7 | 121.2 | 121.7 | 122.1 | 122.6 | 123.1 | 123.5 | 124.0 | 119.3 | 120.7 | 122.1 | 123.5 | 121.4 |
| 2000 | 124.5 | 124.9 | 125.4 | 125.8 | 126.2 | 126.7 | 127.1 | 127.5 | 127.9 | 128.3 | 128.7 | 129.2 | 124.9 | 126.2 | 127.5 | 128.7 | 126.9 |
| 2001 | 129.6 | 129.9 | 130.3 | 130.7 | 131.1 | 131.4 | 131.8 | 132.1 | 132.4 | 132.7 | 133.0 | 133.3 | 129.9 | 131.1 | 132.1 | 133.0 | 131.5 |
| 2002 | 133.5 | 133.7 | 133.9 | 134.0 | 134.1 | 134.2 | 134.2 | 134.2 | 134.2 | 134.2 | 134.1 | 134.1 | 133.7 | 134.1 | 134.2 | 134.1 | 134.0 |
| 2003 | 134.0 | 133.9 | 133.8 | 133.8 | 133.7 | 133.6 | 133.6 | 133.6 | 133.5 | 133.5 | 133.5 | 133.5 | 133.9 | 133.7 | 133.6 | 133.5 | 133.7 |
| 2004 | 133.5 | 133.5 | 133.4 | 133.4 | 133.4 | 133.4 | 133.3 | 133.3 | 133.3 | 133.3 | 133.3 | 133.3 | 133.5 | 133.4 | 133.3 | 133.3 | 133.4 |
| 2005 | 133.3 | 133.4 | 133.4 | 133.5 | 133.6 | 133.7 | 133.8 | 134.0 | 134.1 | 134.3 | 134.4 | 134.6 | 133.4 | 133.6 | 134.0 | 134.4 | 133.8 |
| 2006 | 134.7 | 134.9 | 135.0 | 135.2 | 135.4 | 135.5 | 135.7 | 135.9 | 136.1 | 136.3 | 136.5 | 136.7 | 134.9 | 135.4 | 135.9 | 136.5 | 135.7 |
| 2007 | 136.9 | 137.1 | 137.3 | 137.6 | 137.8 | 138.0 | 138.3 | 138.5 | 138.7 | 139.0 | 139.2 | 139.4 | 137.1 | 137.8 | 138.5 | 139.2 | 138.1 |
| 2008 | 139.6 | 139.8 | 139.9 | 140.1 | 140.2 | 140.4 | 140.5 | 140.6 | 140.7 | 140.7 | 140.7 | 140.7 | 139.8 | 140.2 | 140.6 | 140.7 | 140.3 |
| 2009 | 140.7 | 140.7 | |||||||||||||||
| Utilization (percent) |
|||||||||||||||||
| 1979 | 85.8 | 86.1 | 86.1 | 85.0 | 85.5 | 85.3 | 84.9 | 84.1 | 84.1 | 84.4 | 84.1 | 84.0 | 86.0 | 85.3 | 84.4 | 84.2 | 85.0 |
| 1980 | 84.2 | 84.1 | 83.7 | 81.9 | 79.7 | 78.5 | 77.8 | 77.9 | 79.0 | 79.8 | 81.0 | 81.3 | 84.0 | 80.0 | 78.2 | 80.7 | 80.7 |
| 1981 | 80.7 | 80.1 | 80.3 | 79.7 | 80.0 | 80.2 | 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 | 73.9 | 73.6 | 72.8 | 72.5 | 71.8 | 71.5 | 70.9 | 75.9 | 74.4 | 72.9 | 71.4 | 73.7 |
| 1983 | 72.2 | 71.8 | 72.3 | 73.2 | 73.7 | 74.1 | 75.2 | 76.0 | 77.1 | 77.7 | 77.9 | 78.2 | 72.1 | 73.6 | 76.1 | 77.9 | 74.9 |
| 1984 | 79.7 | 80.0 | 80.2 | 80.6 | 80.8 | 81.0 | 81.0 | 80.9 | 80.6 | 80.3 | 80.4 | 80.3 | 80.0 | 80.8 | 80.8 | 80.3 | 80.5 |
| 1985 | 79.9 | 80.0 | 79.9 | 79.6 | 79.5 | 79.3 | 78.7 | 78.8 | 79.0 | 78.5 | 78.7 | 79.4 | 79.9 | 79.5 | 78.8 | 78.9 | 79.3 |
| 1986 | 79.6 | 79.0 | 78.4 | 78.3 | 78.4 | 78.1 | 78.4 | 78.2 | 78.3 | 78.6 | 78.8 | 79.4 | 79.0 | 78.3 | 78.3 | 78.9 | 78.6 |
| 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 | 80.5 | 81.5 | 83.1 | 81.2 |
| 1988 | 83.4 | 83.6 | 83.8 | 84.2 | 84.1 | 84.2 | 84.3 | 84.7 | 84.3 | 84.7 | 84.8 | 85.0 | 83.6 | 84.2 | 84.4 | 84.8 | 84.3 |
| 1989 | 85.1 | 84.6 | 84.7 | 84.6 | 83.8 | 83.7 | 82.8 | 83.3 | 83.0 | 82.7 | 82.8 | 83.1 | 84.8 | 84.0 | 83.0 | 82.9 | 83.7 |
| 1990 | 82.5 | 83.1 | 83.3 | 83.0 | 83.0 | 83.1 | 82.8 | 82.9 | 82.9 | 82.2 | 81.0 | 80.3 | 83.0 | 83.1 | 82.9 | 81.2 | 82.5 |
| 1991 | 79.9 | 79.2 | 78.7 | 78.8 | 79.5 | 80.1 | 80.0 | 80.0 | 80.6 | 80.4 | 80.2 | 79.8 | 79.3 | 79.5 | 80.2 | 80.1 | 79.8 |
| 1992 | 79.1 | 79.6 | 80.1 | 80.5 | 80.6 | 80.5 | 81.0 | 80.4 | 80.5 | 80.9 | 81.1 | 80.9 | 79.6 | 80.6 | 80.6 | 81.0 | 80.4 |
| 1993 | 81.2 | 81.4 | 81.3 | 81.4 | 81.0 | 81.1 | 81.3 | 81.2 | 81.4 | 81.9 | 82.1 | 82.3 | 81.3 | 81.2 | 81.3 | 82.1 | 81.5 |
| 1994 | 82.5 | 82.3 | 83.0 | 83.2 | 83.4 | 83.7 | 83.6 | 83.7 | 83.6 | 84.1 | 84.3 | 84.9 | 82.6 | 83.4 | 83.6 | 84.4 | 83.5 |
| 1995 | 84.9 | 84.6 | 84.4 | 84.1 | 84.0 | 83.9 | 83.3 | 84.2 | 84.2 | 83.7 | 83.6 | 83.6 | 84.6 | 84.0 | 83.9 | 83.6 | 84.0 |
| 1996 | 82.6 | 83.6 | 83.1 | 83.4 | 83.5 | 83.9 | 83.4 | 83.5 | 83.6 | 83.2 | 83.5 | 83.7 | 83.1 | 83.6 | 83.5 | 83.5 | 83.4 |
| 1997 | 83.3 | 83.9 | 84.2 | 83.8 | 83.9 | 83.8 | 83.8 | 84.4 | 84.7 | 84.7 | 85.0 | 84.7 | 83.8 | 83.8 | 84.3 | 84.8 | 84.2 |
| 1998 | 84.6 | 84.1 | 83.6 | 83.5 | 83.6 | 82.6 | 81.8 | 83.1 | 82.4 | 82.6 | 82.1 | 82.0 | 84.1 | 83.2 | 82.4 | 82.2 | 83.0 |
| 1999 | 82.1 | 82.1 | 81.9 | 81.7 | 82.0 | 81.5 | 81.8 | 81.9 | 81.3 | 82.1 | 82.2 | 82.6 | 82.0 | 81.8 | 81.6 | 82.3 | 81.9 |
| 2000 | 82.3 | 82.4 | 82.4 | 82.6 | 82.5 | 82.3 | 81.8 | 81.4 | 81.5 | 80.9 | 80.7 | 80.1 | 82.4 | 82.5 | 81.6 | 80.6 | 81.7 |
| 2001 | 79.3 | 78.6 | 78.1 | 77.7 | 76.9 | 76.2 | 75.7 | 75.2 | 74.7 | 74.1 | 73.6 | 73.5 | 78.7 | 76.9 | 75.2 | 73.7 | 76.1 |
| 2002 | 73.7 | 73.6 | 74.1 | 74.2 | 74.5 | 75.2 | 74.9 | 75.0 | 75.0 | 74.9 | 75.2 | 74.9 | 73.8 | 74.7 | 75.0 | 75.0 | 74.6 |
| 2003 | 75.5 | 75.8 | 75.7 | 75.1 | 75.2 | 75.3 | 75.6 | 75.6 | 76.0 | 76.1 | 76.8 | 76.7 | 75.6 | 75.2 | 75.7 | 76.5 | 75.8 |
| 2004 | 77.0 | 77.4 | 76.9 | 77.3 | 77.9 | 77.2 | 77.7 | 77.9 | 77.9 | 78.7 | 78.8 | 79.4 | 77.1 | 77.5 | 77.9 | 79.0 | 77.9 |
| 2005 | 79.7 | 80.2 | 80.1 | 80.0 | 80.2 | 80.4 | 80.3 | 80.4 | 78.9 | 79.7 | 80.5 | 80.9 | 80.0 | 80.2 | 79.9 | 80.4 | 80.1 |
| 2006 | 80.9 | 80.8 | 80.8 | 81.0 | 80.8 | 81.1 | 81.1 | 81.2 | 80.8 | 80.6 | 80.3 | 80.9 | 80.8 | 81.0 | 81.1 | 80.6 | 80.9 |
| 2007 | 80.3 | 80.8 | 80.6 | 80.7 | 80.7 | 80.6 | 80.7 | 80.6 | 80.7 | 80.2 | 80.5 | 80.6 | 80.6 | 80.6 | 80.7 | 80.4 | 80.6 |
| 2008 | 80.5 | 80.2 | 79.8 | 79.2 | 78.9 | 78.7 | 78.6 | 77.6 | 74.5 | 75.5 | 74.6 | 72.7 | 80.1 | 78.9 | 76.9 | 74.3 | 77.6 |
| 2009 | 71.3 | 70.2 | |||||||||||||||
Note: Estimates from October 2008 through February 2009 are subject to further revision in the upcoming monthly releases.