Because this is such a major issue, you would think that someone would catch this mistake before production?
But, in the spirit of Junk Charts, I'll offer the way I think this should look. I think the insured/uninsured/underinsured lines need to be plotted over time on a single line graph to support the author's point, which is that the underinsured population has grown over time.
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PS. The original report is here. All of the supporting displays are eye-gouging tables. I made the chart I suggested, and even with Excel Defaults, it beats the heck out of the pie chart.