Have we learned nothing?

I hate to seem as if I'm poking fun at the US Army's 300-page report on suicides, but this "maze of debauchery" is, in my opinion, worse than the infamous "Afghandyland" chart.

Despite the text which accompanies the picture (see page 4 of the PDF file), and the legend in the lower left-hand corner, I have absolutely no idea what this chart is attempting to convey.  

And I've been doing mazes since I was about four years old, so I'm quite familiar with them...