India -- How could I leave it out.

https://www.google.com/search?q=population+of+india&oq=Population+of+India&aqs=chrome.0.0i433i512l3j0i512l7.11616j0j7&sourceid=chrome&ie=UTF-8

China --

https://www.google.com/search?q=china+population&oq=cHINA+pOPULATION&aqs=chrome.0.0i67i433i512i650j0i67i512i650j0i131i433i512j0i67i433i512i650j0i433i512j0i67i433i512i650j0i67i512i650j0i512l3.9052j0j7&sourceid=chrome&ie=UTF-8

U.S. --

https://www.google.com/search?q=us+population&oq=us++pOPULATION&aqs=chrome.0.0i67i433i512i650j0i67i512i650j0i131i433i512j0i433i512j0i67i512i650j0i433i512j0i512j0i67i433i512i650j0i512j0i67i512i650.6744j0j7&sourceid=chrome&ie=UTF-8

Japan --

https://www.google.com/search?q=japan+population&oq=Japan+Population&aqs=chrome.0.0i433i512j0i512j0i433i512l4j0i512l4.8607j0j7&sourceid=chrome&ie=UTF-8