Stacked bar graphs are very helpful when presenting a comparison of data.
This is a stacked bar graph built with CSS (& based on Pure CSS Data Chart).

It uses “definition lists” in the HTML for presenting the data & “unordered lists” for the labels on axes.
Source files can be downloaded from the author’s website & a demo can be found here.
Requirements: No Requirements
        Compatibility: All Major Browsers
        Website: http://www.thewojogroup.com/2008/12/css-stacked-bar-…
        Demo: http://assets.thewojogroup.com/csschart/