India has 1.3 billion people, or 17.5% of the world's population, half of whom are under 25. It is the second most populous country in the world after China and is expected to become the most populous around 2025. Its population growth rate was 1.2% in 2014. India has more than 2,000 ethnic groups, several hundreds of languages belonging to four different families (Indo-European, Dravidian, Austro-Asian and Tibetan-Burmese) and all the great religions of the world are represented there. Ethnic composition: Indo-Aryans 72%, Dravidians 25%, Mongoloids and others 3%.