May, 2004 Natural Gas Customer Choice Program Customer Enrollment Levels Residential Customer Enrollment Customer Choice  Program Enrolled Residential Customers Percent Residential Enrolled Columbia Gas of Ohio 558,788 of 1,245,970 45%

October, 2004 Natural Gas Customer Choice Program Customer Enrollment Levels Residential Customer Enrollment Customer Choice  Program Enrolled Residential Customers Percent Residential Enrolled Columbia Gas of  Ohio 469,945 of 1,238,201 38%

November, 2004 Natural Gas Customer Choice Program Customer Enrollment Levels Residential Customer Enrollment Customer Choice  Program Enrolled Residential Customers Percent Residential Enrolled Columbia Gas of Ohio 476,874 of 1,251,659 38%

  Natural Gas Customer Choice Program Customer Enrollment Levels September, 2005                          

December, 2003 Natural Gas Customer Choice Program Customer Enrollment Levels Residential Customer Enrollment Customer Choice  Program Enrolled Residential Customers Percent Residential Enrolled Columbia Gas of  Ohio 561,649 of 1,246,256 45%

February 2004 Natural Gas Customer Choice Program Customer Enrollment Levels Residential Customer Enrollment Customer Choice  Program Enrolled Residential Customers Percent Residential Enrolled Columbia Gas of Ohio 525,982 of 1,202,587 43.8%

January 2004 Natural Gas Customer Choice Program Customer Enrollment Levels Residential Customer Enrollment Customer Choice  Program Enrolled Residential Customers Percent Residential Enrolled  Columbia Gas of Ohio 564,912 of 1,250,218 45%

March, 2004 Natural Gas Customer Choice Program Customer Enrollment Levels Residential Customer Enrollment Customer Choice  Program Enrolled Residential Customers Percent Residential Enrolled Columbia Gas of Ohio 518,866 of 1,198,988 43.3%