The figures are based on nominal GDP and GDP (PPP) Purchasing Power Parity and sector composition ratios provided by the CIA (Central Intelligence Agency) World Factbook at market or government official exchange rates with figures in trillions of United States dollars.
Here are the following sectors:
Agricultural (or primary) sector:
Agriculture (a term which encompasses farming) is the process of producing food, feed, fiber and other goods by the systematic raising of plants and animals. Agricultural output is a component of the GDP of a nation.
Industrial (or secondary) sector:
Industry is the segment of economy concerned with production of goods (including fuels and fertilizers). Industrial output is a component of the GDP of a nation. It includes mining and extraction sectors.
Service (or tertiary) sector:
A service is the non-material equivalent of a good. Service provision is defined as an economic activity that does not result in ownership, and this is what differentiates it from providing physical goods. It is claimed to be a process that creates benefits by facilitating either a change in customers, a change in their physical possessions, or a change in their intangible assets. Service output is a component of the GDP of a nation. The service sector includes (but is not limited to) farm and factory related activities.