Charts on this page:
- Print Material Expenditures
- Electronic Material Expenditures
Print Material Expenditures
* Data not adjusted for inflation.
Print Material Expenditures Adjusted for Inflation
* Data expressed in 2007 dollars.
Electronic Material Expenditures
* Data not adjusted for inflation.
Electronic Material ExpendituresAdjusted for Inflation
* Data expressed in 2007 dollars.
© Ray Lyons 2009. All rights reserved.