text: We believe that selling, general and administrative expenses in the range of 10% of revenue are 
  appropriate for 2005 given our business platform. 
  
  *Other Charges (Income).*During the fourth quarter of 2002, we recorded a $5.6 million gain on the sale 
  of certain assets for amounts exceeding estimates originally made and recorded as other charges during the 
  fourth quarter of 2001. 
  
  *Operating Income.*Operating income was $452.3 million, $412.7 million and $459.5 million, or, as a 
  percentage of revenue, 16.7%, 16.4% and 19.4%, for the years ended December 31, 2004, 2003 and 2002, 
  respectively. 
  
  *Interest Expense.*We incurred interest expense on our unsecured notes and tax-exempt bonds. Interest 
  expense was $76.7 million, $78.0 million and $77.0 million for the years ended December 31, 2004, 2003 and 
  2002, respectively. In May 2004, $225.0 million of our public notes matured and were repaid resulting in a 
  reduction in interest expense, which was partially oÅset by increases in interest expense resulting from 
  additional tax-exempt Ñnancing obtained during 2004. The increase in interest expense from 2002 to 2003 is 
  due to higher debt balances resulting from additional tax-exempt Ñnancings partially oÅset by lower interest 
  rates. 