The Batek (or Bateq) people are an indigenous Orang Asli people (numbering about 1,519 in 2000); belonging to the Semang group, who live in the rainforest of peninsular Malaysia. As a result of encroachment, they now primarily inhabit the Taman Negara National Park. The Batek are nomadic hunters and gatherers, so the exact location of their settlements change within the general confines of the area that they inhabit. The common phrase used to refer to them, 'orang asli', signifies a diverse group of which the Batek tribe is a part. It means 'original people' in Malay and was probably first used to identify these people by the British. The Batek, however, refer to themselves as 'Batek Teh', which means "forest people". The Malay Srivijaya empire came in contact with the Negrito. Historically they traded with the local populations while other times they were subjected to exploitation, raids, slavery, paying tributes to the Malays. For more than a thousand years, some Negrito tribes from the southern forests were enslaved and exploited until modern times while others remain in isolation and avoided contact. The Batek people were first documented by Europeans in 1878, when explorer-naturalist Nicholai Miklukho-Maklai of Russia wrote about them. Until about 1970 much of inland peninsular Malaysia was difficult to reach for the purposes of logging, so the Batek were widespread throughout that region. Since it is now possible to harvest the trees in that region, the Batek are largely confined to Taman Negara National Park and the surrounding region. The Batek population more than doubled from 530 in 1960 to 1519 in the year 2000. The official census of the Batek population is as follows: These figures include several Batek sub-groups. Ethnographic researchers have recognised several Orang Asli sub-groups that are commonly called 'Batek', including the Batek De' (dɛˀ), Batek 'Iga' (ˀigaˀ), Batek Teh (təh), Batek Tanum (tanɨm) (also known as Mayah), and the Batek Nong (nɔŋ).