Gas Production
| Year | Number of Producing Wells | Dry Production (million cubic feet) |
| 2007 | 5,735 | 112,057 |
| 2006 | 5,179 | 103,027 |
| 2005 | 4,132 | 88,610 |
| 2004 | 3,870 | 85,508 |
| 2003 | 3,506 | 143,644 |
| 2002 | 3,429 | 76,915 |
| 2001 | 3,521 | 71,543 |
| 2000 | 3,051 | 71,545 |
| 1999 | 2,752 | 72,189 |
| 1998 | 2,388 | 57,263 |
| 1997 | 2,046 | 58,249 |
| 1996 | 1,671 | 54,290 |
| 1995 | 1,671 | 49,818 |
| 1994 | 1,470 | 50,259 |
| 1993 | 1,426 | 37,840 |
| 1992 | 1,153 | 24,733 |
| 1991 | 886 | 14,906 |
| 1990 | 819 | 14,774 |