1998
 1997
 1996
Revenues $40,708,348 $37,565,727 $37,608,762
Operating expenses 33,289,448
 31,266,942
 31,168,047
     Operating income 7,418,900 6,298,785 6,440,715
Other income      
     Interest income, net 115,191 247,350 206,852
     Other 113,932
 214,805
 391,693
229,123
 462,155
 598,545
     Income before income taxes 7,648,023 6,760,940 7,039,260
Provision for income taxes 2,982,903
 2,703,135
 2,738,000
     Net income $4,665,120
 $4,057,805
 $4,301,260
Earnings per share, basic $2.25
 $1.92
 $2.07
Earnings per share, assuming dilution $2.23
 $1.89
 $2.03


See accompanying notes to consolidated financial statements.