"All limits, especially national ones, are contrary to the nature of mathematics… Mathematics knows no races… For mathematics the whole cultural world is a single country" – David Hilbert. "Face problems with a minimum of blind calculation, a maximum of seeing thought" – Hermann Minkowski
A pie chart
You put your data into a table, and add up all the values to get a total. Divide each value by the total and multiply by 360 to find the number of degrees that value should get in the pie chart.