The two-wheeler segment remained unchanged except for to increased sales to the middle class in urban areas. There was emphasis on having more farm tractors, as India was embarking on a new Green Revolution; and Russian and eastern bloc imports were brought in to meet the demand. But after 1970, with restrictions on the import of vehicles set, the automotive industry started to grow; but the growth was mainly driven by tractors, commercial vehicles and scooters. Cars still remained a major luxury item. In the 1970s, price controls were finally lifted, inserting a competitive element into the automobile market. However, by the 1980s, the automobile market was still dominated by Hindustan and Premier, who sold superannuated products in fairly limited numbers. The rate of car ownership in 1981 was about one in every thousand citizens – understandable when the annual road tax alone cost about half the average income of an Indian at the time. During the eighties, a few competitors began to arrive on the scene. Of the 30,487 cars built in India in 1980, all but six came from the two main players Hindustan and Premier: Standard had led a shadow existence in the latter half of the 1970s, producing only a handful of cars to keep their license active. A new contender was tiny Sipani, who had tried building locally developed three-wheeled vehicles since 1975 but introduced the Reliant Kitten-based Dolphin in 1982. Nonetheless, all eyes were on Sanjay Gandhi's Maruti project, which was destined to cause major upheaval to the Indian automobile industry. The OPEC oil crisis saw increase need to installing or redesign some vehicle to fit diesel engines on medium commercial vehicle. Until the early 1970s Mahindra Jeeps were on Petrol and Premier commercial vehicles had Petrol model options. The Defence sector too had most trucks on Petrol engines. From the end of the 1970s to the beginning of the 1980s India saw no new models, the country continuing to depend on two decades-old designs. The Sipani Dolphin, which arrived in 1982, was not a serious contender, with its plastic body and without rear doors - essential to Indian car buyers. This situation forced the government to encourage and let more manufacturers into fray. In 1984, the then Prime Minister of India, Indira Gandhi established the Ordnance Factory Medak, near Hyderabad. It started manufacturing Infantry Combat Vehicles christened as "Sarath", the backbone of India's mechanised infantry. OFMK is still the only manufacturing facility of ICVs in India.