 However, of these, only 56 were listed in the Ministry of Social Development and Human Security's 2015 "Master Plan for the Development of Ethnic Groups in Thailand 2015-2017", with the larger, ethnoregional ethnic communities, including the Central Thai, being omitted; it therefore covers only 9.7% of the population.Twenty million Central Thai (together with approximately 650,000 Khorat Thai) made up approximately 20,650,000 (34.1 percent) of the nation's population of 60,544,937 at the time of completion of the Mahidol University "Ethnolinguistic Maps of Thailand" data (1997), which provides population numbers for most ethnolinguistic minorities.The 2011 Thailand Country Report provides population numbers for mountain peoples ("hill tribes") and ethnic communities in the northeast and is explicit about its reliance on the Mahidol University Ethnolinguistic Maps of Thailand data.