Avoid Injury at Burning Man

Going to burning man?  Here's an info-graphic that tells you how most people get injured, whether drugs or alcohol were involved, and what kind of treatment they get.  It looks great and conveys a lot of info, but I think they could have done a better job of allowing you to compare the difference between the years.  Instead of having the years next to each other as wedges, it would have been interesting to show how things change over time by making putting the past in the farther out rings.

What do you think?

Thanks to Awesome.good.is for the graphic.