China- 1.3 billion people (1,330,044,605 as of mid-2008), dived by 9,596,960 kilometer square, equal about 14 people/km2.
Vietnam- 83,535,576 people, dived by the size of 331,690 kilometer square, equal about 252 people/ kilometer square.
India- 1,210,000,000 (1.21 billion) people, divide by 3.29 million (3,290,000) kilometer square, equal about 369 people/kilometer square.
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Price of rice: 2011- 20,000 VND/kg
2010- 18,000 VND/kg
2009- 15,500 VND/kg
2008- 13,000 VND/kg
Reasons: The price of rice increased all the time, always increase, never decrease. The reason is because the price of all kind of materials like fertilizer, taxs, transportation, and all things that used for help crops grow were increase a lot, so the farmers and business people have to increase the price of rice, for making profits.
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