Problem with percent histogram

Hi everyone!

I wanna make a percent histogram like this one on visual studio via Crystal Report.

http://img534.imageshack.us/img534/2893/reportpo.png

I got some problems because cannot realize this and I dont know how to do it.

I have a database with one table and some columns and the purpose is to do for each column a percent histogram bar.

I've tried a lot of solution but all failed.

Can anyone help me please?

Thanks a lot!