was taken into use in 1961. By 1969, there were 140 registered snowmobiles and only 33 registered cars. From 1962 to 1984, a recreational centre was run at Sverdrupbyen. Ordinary operation in Mine 4 started in 1966 but was terminated by 1970, two years after Mine 2b closed. Operations in Mine 6 commenced in 1969. Television broadcasting equipment was installed in 1969, with the schedule of the Norwegian Broadcasting Corporation being aired with a two-week delay. In 1971, a new school building, with a combined primary and lower secondary school, was opened, along with a new gymnasium and a swimming pool. The Svalbard Council was established on 1 November 1971. It consisted of 17 non-partisan members who were elected or appointed in three different groups: SNSK employees, government employees and others, although the ratio changed several times. Operations of Mine 3 started in March 1971 and operations in Mine 7 commenced the following year. In 1973, the Ministry of Trade and Industry bought a third of SNSK. It continued buying additional shares until it reached a 99.94 percent ownership in 1976. The airport was opened in 1975 and initially provided four weekly services to mainland Norway and semi-weekly services to Russia. In 1978, the community received satellite communications with the mainland. The same year, an upper secondary program was introduced at the public school. From 1984, television programmes were broadcast live via satellite. Store Norske underwent a gradual change during the 1980s. Since 1980, Spitsbergen money has been taken out of circulation and replaced with ordinary Norwegian currency. Mine 6 closed the following year. From 1982, SNSK permitted private individuals to own and operate cars. By 1990, there were 353 registered cars and 883 snowscooters. On 1 July 1983, SNSK moved its head office from Bergen to Longyearbyen. Svalbard Samfunnsdrift (SSD), a limited company that was responsible for public infrastructure and services, was established by SNSK on 1 January 1989. Responsibilities included healthcare, the fire brigade, the kindergarten, roads, rubbish disposal, power production, the water and sewer system, the cinema, cultural activities and the library. Ownership was taken over by the Ministry of Trade and Industry on 1 January 1993. During the 1990s, the authorities started a process to "normalise" Longyearbyen by abolishing the company town scheme and introducing a full range of services, a varied economy and local democracy. Commercial enterprises included a shopping mall replacing SNSK's provision store