What is meant by occupational structure?

What is meant by occupational structure? Explain the occupational structure of India.

Occupational structure:
It is the mix of different types of occupations found in a society.
It also describes how people are engaged in different sectors of the economy namely, primary, secondary and tertiary the sector that predominates the occupational structure in a country.
Occupational structure of India:
In India in 2005, 54.2% of the population was in primary occupations, 18.8% in secondary occupations and 27% in tertiary occupations. This means most of the people are engaged in primary sector.