Mizoram (pronmɪˈzɔːrəm) is a state in northeast India, with Aizawl as its seat of government and capital city. The name of the state is derived from "Mizo", the self-described name of the native inhabitants, and "Ram", which in the Mizo language means "land." Thus "Mizo-ram" means "land of the Mizos". Within India's northeast region, it is the southernmost landlocked state, sharing borders with three of the Seven Sister States, namely Tripura, Assam and Manipur. The state also shares a border with the neighbouring countries of Bangladesh and Myanmar. Like several other northeastern states of India, Mizoram was previously part of Assam until 1972, when it was carved out as a Union Territory. In 1986 the Indian Parliament adopted the 53rd amendment of the Indian Constitution, which allowed for the creation of the State of Mizoram on 20 February 1987, as India's 23rd state. According to a 2011 census, in that year Mizoram's population was 1,091,014. It is the 2nd least populous state in the country (after Sikkim, with population of 610,577 in 2011). Mizoram spans over an area of approximately 21,087 square kilometres, of which approximately 91% is forested. About 95% of Mizoram's population descends from a diverse tribal origin. Mizos first began to settle the area in the 16th century, coming in waves of immigration from East Asia. This immigration lasted through the 18th century. Among all of the states of India, Mizoram has the highest concentration of tribal people. The Mizoram people are currently protected under the Indian constitution as a Scheduled Tribe. Mizoram is one of three states of India with a Christian majority (87%). Its people belong to various Christian denominations, being mostly Presbyterians in the north and Baptists in the south. Mizoram is a highly literate agrarian economy. Slash-and-burn farming, also known as Jhoom farming is the most common form of farming. In recent years, the jhoom farming practices have been steadily replaced with a significant horticulture and bamboo products industry.