This document presents a case study on India's national income from 1975-2010. It summarizes key growth rates during this period, such as 9.5% in 1975-76 and 8.9% in 2010. It defines national income as the value of goods and services produced within a country during a year. National income in India is prepared based on three categories: agriculture and related sectors, electricity and related sectors, and other services. The document also discusses measuring national income at constant prices to analyze physical output over time and limitations of different measurement methods.