When I first saw this visualization, I was automatically reminded of the IKEA ball pits.  I remember my parents dropping me off in this area while they went shopping.  Goes to show you how long its’ been around.  Back to the data -> this isn’t as cheery and I would classify this more as an infographic.  Not a major fan of the ball display, I find it hard to discern exact percentages but it’s apparent how they group together.  The line graph provides a bit more detail.