An aggregation is a process in which numbers are gathered for statistical purposes and are expressed as one number. This could be in the form of a total or an average.
An example is the EU aggregate for population, where the figures for the total population of each individual EU Member State are added up into a total for the whole EU.
An aggregate is very often used in statistics, mostly to show a total or an average. Shares and percentages are very often calculated with the total as a basis.
Example
An EU (EU-27) aggregate can look like this:
