Charts like this are fine, for those of 20 years of age, and no problems seeing all the colors of the spectrum.
Since I DO have problems seeing certain colors of the spectrum, this graph cannot be correctly interpreted to determine which percentage goes with which group!
As far as Windoze 8 matters, no, no, (CH)UCK NO!
Well, I can see colors fine, but whoever made this graph used the same shade of gray for two wedges and the same shade of blue for two wedges. There ARE enough colors in this world so you don't have to double up twice on something this simple.
Their color squares before the names on the right are tiny. They should also write the percentages right after the squares and before the names, since they put them not in high to low order, but in clockwise order.
The thing was probably designed by an 'artist' who wanted style over function. The kind of person who would use three shades of purple for stoplights and make them squares, circles, and triangles.