Pie Chart
Suffice common way graphic structure of statistical aggregates is pie graph, as the idea of a very clearly expressed in terms of who represents the entire set. The relative magnitude of each value is represented by a sector of a circle whose area corresponds to the contribution of this value in the sum of the values. This kind of graphs is useful when you want to show the proportion of each variable in the total. Sector can be described as generally round, and separately located at a short distance from each other.
Pie chart retains visibility only if the number of parts together a little chart. If parts of the chart too much, its use is inefficient due to insignificant differences in compared structures. Lack of pie charts - small capacity, the inability to reflect a wide range of useful information.