All major religious groups in India have shown sharp declines in their fertility rates, limiting change in the country’s religious composition since 1951. Meanwhile, fertility differences between India’s religious groups are generally much smaller than they used to be.
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Mapped: The World's Major Religions, by Distribution
Christians and Sikhs have the highest levels of educational attainment; Sikhs are the wealthiest of India's major religious groups; Muslims are the most urban Non-Political : r/india
Ethnic, Linguistics and Religious Composition of India by Atula Ahuja
India's religious composition has largely remained same since first Census in 1951: Study
Key Findings About The Religious Composition of India, PDF
Religion in India: Tolerance and Segregation
Muslims are the poorest religious group in India
How Fake News Breathes New Life Into a Long-Debunked Myth About Muslim Population Growth — Hindus for Human Rights