Was there any attempt to include in the statistics who already does and doesn’t print in the library? Were the amount students who own a printer counted for in the statistics promoted along with PrintGreen?
It is important to remember that PrintGreen is a campus-wide initiative and includes printing across campus, not just the printing that happens in the library.
Technology Services tracked student print use last year. The vast majority of students will never print over 750 pages. You can see a graph of the data they collected last year here: http://www.pugetsound.edu/about/offices–services/technology-services/help–support/printgreen/
It is unclear to me as to how printing done by students on their own printers would affect the print statistics gathered last academic year. Perhaps you could clarify question?