You could dump your xls into a google docs spreadsheet and share that or the charts it makes after locking edit permissions down to just you. Or screenshot the charts and upload the pics to imgur.
I'm familiar with imgur, but never had an account. I just spent about 20mins doing screenshots and using that webservice. Although I can do separate links, it appears that just sharing the album is easiest. Tell me, does this link work to view multiple pages? http://eqservers.imgur.com