The centre circle shows the total amount of wheat in 2011. The next circle out is made up of arcs for the 6 categories of use; food, food production, feed, seed, waste and other. The next layer out is broken down into 5 world regions for each use, before going down to individual countries. Move the mouse over each sector to read the amount of wheat in 1000 tonnes. Units are in 1000 metric tons.
Click on any arc to zoom in, and click on the center circle to zoom out.
Adapted from zoomable sunburst with updating data