Since all of your values fall into one of 3 categories, PROC FACTOR may not be your best choice for analysis.  Take a look at PROC CORRESP for correspondence analysis, and in particular, you might find Example 34.1 Simple and Multipple Correspondence Analysis of Automobiles and Their Owners as a good analogy to your data.   http://support.sas.com/documentation/cdl/en/statug/68162/HTML/default/viewer.htm#statug_corresp_examples01.htm   Correspondence analysis avoids the assumption that the data are continuous (or at least ordinal) and thus might be a better fit.   Steve Denham     ... View more