This pie chart provides a visual representation of data, showing the relative sizes of different categories or components of a whole. It can be used to compare proportions or percentages of a given set of data, or to show the breakdown of a single variable across different categories. The chart is divided into sections
From Wikipedia
A pie chart is a circular statistical graphic which is divided into slices to illustrate numerical proportion. In a pie chart, the arc length of each slice is proportional to the quantity it represents. While it is named for its resemblance to a pie which has been sliced, there are variations on the way it can be presented. The earliest known pie chart is generally credited to William Playfair's Statistical Breviary of 1801.