hot to get percentages from text values?

Hi all, I'm developing a fairly large survey online, and haven't found any applications which I could use (can anyone help me on this?). Now its not that hard for me to input stuff into a database using php and mysql, but the problem will be extracting the info. One of the things I need to do is get percentage values of total answers which are text based answers. Eg. - x% of people had sex before they were 16. x% of people lost their virginity between the age of 17-19 etc. etc... any help?? thanks in advance! /sunny __________________________________________________ Do You Yahoo!? Yahoo! Mail - Free email you can access from anywhere! http://mail.yahoo.com/