From the Wikipedia article:
The World Factbook (ISSN 1553-8133; also known as the CIA World Factbook)[1] is an annual publication of the Central Intelligence Agency of the United States with almanac-style information about the countries of the world. The Factbook provides a two- to three-page summary of the demographics, geography, communications, government, economy, and military of 268 U.S.-recognized countries, dependencies, and other areas in the world. The World Factbook is prepared by the CIA for the use of U.S. government officials, and its style, format, coverage and content are primarily designed to meet their requirements.[2] However, it is frequently used as a resource for student papers, web sites and non-governmental publications.[1] As a work of the U.S. government, it is in the public domain.[3]
Discussion
Want a projection for 2025 and 2050: Indonesia is projected to surpass China and become the most populous country by 2050. I don’t remember the source but it was some sort of a world non-profit group, data published on the web.
I think you mean India, not Indonesia.