PEOPLES GAS SYSTEM
GAS OPERATING STATISTICS (Unaudited)

                       
  Operating Revenues*           Therms*        
Three Months Ended December 31,         Percent           Percent
  2001   2000   Change   2001   2000   Change
                       
By Customer Segment:                      
Residential $ 15,731   $ 21,770   (27.7)   12,076   15,884   (24.0)
Commercial 27,951   42,231   (33.8)   77,561   78,390   (1.1)
Industrial 2,606   3,165   (17.7)   36,855   66,780   (44.8)
Off System Sales 9,264   3,939   --   34,865   6,269   --
Power generation 2,784   2,664   4.5   110,058   80,497   36.7
Other revenues 7,554   10,633   (29.0)   -   -   --

  $ 65,890   $ 84,402   (21.9)   271,415   247,820   9.5

                       
By Sales Type:                      
System supply $ 41,070   $ 60,513   (32.1)   71,597   65,316   9.6
Transportation 17,266   13,256   30.3   199,818   182,504   9.5
Other revenues 7,554   10,633   (29.0)   --   --   --

  $ 65,890   $ 84,402   (21.9)   271,415   247,820   9.5

                       
Average customers 270,374   259,425   4.2   --   --   --

                       
                       
                       

  Operating Revenues*           Therms*        
Twelve Months Ended December 31,         Percent           Percent
  2001   2000   Change   2001   2000   Change
                       
By Customer Segment:                      
Residential $ 88,222   $ 73,232   20.5   58,843   57,631   2.1
Commercial 163,585   145,831   12.2   308,916   292,077   5.8
Industrial 12,221   12,890   (5.2)   216,472   278,371   (22.2)
Off System Sales 38,218   38,762   (1.4)   105,543   95,776   10.2
Power generation 11,568   10,725   7.9   427,886   418,583   2.2
Other revenues 39,070   33,019   18.3   --       --

  $ 352,884   $ 314,459   12.2   1,117,660   1,142,438   (2.2)

                       
By Sales Type:                      
System supply $ 250,966   $ 232,774   7.8   292,181   320,601   (8.9)
Transportation 62,848   48,666   29.1   825,479   821,837   0.4
Other revenues 39,070   33,019   18.3   --   --   --

  $ 352,884   $ 314,459   12.2   1,117,660   1,142,438   (2.2)

                       
Average customers 266,594   256,223   4.0   --   --   --

                       
* in thousands