In 1991,Thailand become the world's largest producer and exporter of natural rubber. Rubber can be considered to be one of important export of Thailand. The living of one tenth of the population depends on rubber. In 2002,the total land under rubber in Thailand almost two million hectarce with production around 2.62 million tons. With 87.5% in the south, 10% is in the Southest and about 2.5% is in the Northeast of the country.