One way would be to take a screen shot of the table/spread sheet etc containing your info, save it as a jpeg and post the image to an image hosting site like photobucket and then post the url to the image into your post using the tags.
Irfanfiew is a free image viewer that has an easy to use screen capture feature, there are many other programs that will do this though, irfanview is just the program that I use, and photobucket accounts are free too.
If you want any help to sort this out pm me and ill try to give you a complete click by click walkthrough.