for the second time (1974–1979), Vilim Mulc (1979–1982), Josip Štefan (1982–1984), Zdravko Saršon (1985–1987), and Željko Lužavec (1988–1993). The majority of mayors came from small towns in the immediate surrounding area. The traffic of the port complex had increased from 420,000 tons in 1946 to more than 20,000,000 tons in 1980. The port was involved in more than 50% of traffic across the country and about 80% in terms of its sea transit. In 1980, Rijeka handled 20% of exports from Croatia and 10% of those of Yugoslavia. In 1980, when the merchant navy was at its peak, Rijeka's shipping had a cargo capacity of 500,000 tons. Jugolinija was the largest shipping company of the country, while Jadrolinija had 49 ships and provided passenger transportation service by ferry-boats. Approximately 23,000 people were employed in industry in that year. Over 80% of the total industrial production was by the energy sector (electric power industry, oil processing, and coal), as well as shipbuilding. This, coupled with the low number of finished products, explains why the industry of Rijeka collapsed in the early 1990s. In 1982 there were 92,489 employees out of a population of 193,000. The oil refinery treated 8,000,000 tonnes – 28% of the country's total turnover. The plant had been based in Urinj since 1966. In the Eighties the construction of a petrochemical complex in Omišalj began, which later posted one of the biggest losses in the country. The Maj 3 shipyard handled about one third of the shipbuilding industry. The peak in production was achieved between 1971 and 1975, when 32 ships were built, totalling more than 1,200,000 gross tons. These vessels were mainly for export. In the Eighties smaller boats were built and production increased to employ 7,000 shipyard workers, and Maj 3 became the largest company in Rijeka. At the same time the Viktor Lenac Shipyard in Martinščica became the largest repair yard in the Mediterranean. The development of the metalworking industry was linked to the needs of shipbuilding. Thus Vulkan manufactured cranes for the Rikard Benčić ship pumps, Torpedo manufactured diesel engines and tractors, Rade Končar built electric generators, while Metalografički Kombinat was directed towards the production of metal packaging for the purposes of refinery. Civil engineering was expanding to the point that cooperatives such as Primorje, Jadran, Kvarner, and Konstruktor employed some 10,000 workers overall in 1981. More than 6,000 of them were engaged in