15. Population
Explanation:
1,028 million India’s population as on 1 March 2001 stood at 1,028 million (532.1 million males and 496.4 million females). As per Census 2011, India's population stood at 1,21,05,69,573. India accounts for a meagre 2.4 per cent of the world surface area of 135.79 million sq km. Yet, it supports and sustains a whopping 17.5 per cent of the world population.