Batam is one of the 3,000 islands, which make up the Riau Archipelago and is closest to Singapore, which is only 20 km away or twenty minutes by air-conditioned ferry. It has a rapid-growing population of around 100.000. As the island develops into a major industrial and tourist area, it attracts an ever-increasing population from other Indonesian islands who see Batam as a haven of opportunity. Once almost uninhabited, save for a few scattered fishing communities, Batam's history took a sharp turn beginning 1969, when it became support base for the State-owned 'Pertamina oil company' and its offshore oil exploration. In 1971 a presidential decree designated it as an industrial area and in 1975 the Batam Authority was formed. In 1978 Batam was established as a bonded area.