In 1995, 28 percent of the population was classed as below the poverty line, compared to just 7 percent in central Thailand. In 2000, per capita income was 26,317 baht, compared to 208,434 in Bangkok. Even within Isan, there is a rural/urban divide. In 1995, all of Thailand's ten poorest provinces were in Isan, the poorest being Sisaket. However, most wealth and investment is concentrated in the four major cities of Khorat, Ubon, Udon, and Khon Kaen. These four provinces account for 40 percent of the region's population.