The graphs on the left, such as they alredy explained, show the increase on population, first graph, and rates of urbanisatio in China and India through time, second graph.
The population in China, India and the US, such as shown on the graph at the top and as we can see has had a notable increase since 1950.
In China in 1980 the population had increased from 500 to 1000, so far on the 1990, the population increased about 300 million people, in The 2005 the population was around 1250 million people, and they expect 1500 after the 2030's.
In India and Us the population has a big difference, in the 1950's in India was 500 million people, in the US 250 million people.
In the 1990's in India the populatin was around 850 million peolple, in the Us exacty 250 million people and the expectations fot the 2030's in India is around 1500 millions, the Us 350 million people.
The chart below, shows the urbanization in India and China.
The urabanization, such as i understand the graph, has only increased while ruralizatin has decreased.
In 1985 India had 200 million people urbanized and China aroun 250 million people.
Nowadays not only in India but also in China, the urban population has commonly increased;in India about 350 million people while in China around 550 million people.
The decrease and increase on ruralization has also an important impact, since 1950 to 2008 In india the population increased to 800 millions, and on China it decreased to 700 millions.