during the 1990s and transition to market economy during the 2000s. The industrial output saw dramatic downsizing: in 2013 it was expected to be only a half of that of 1989. Main industrial sectors include: automotive, mining, non-ferrous metals, food-processing, electronics, pharmaceuticals, clothes. Serbia has 14 free economic zones as of September 2017, in which many foreign direct investments are realised. Automotive industry (with Fiat Chrysler Automobiles as a forebearer) is dominated by cluster located in Kragujevac and its vicinity, and contributes to export with about $2 billion. Country is a leading steel producer in the wider region of Southeast Europe and had production of nearly 2 million tonnes of raw steel in 2018, coming entirely from Smederevo steel mill, owned by the Chinese Hesteel. Serbia's mining industry is comparatively strong: Serbia is the 18th largest producer of coal (7th in Europe) extracted from large deposits in Kolubara and Kostolac basins; it is also world's 23rd largest (3rd in Europe) producer of copper which is extracted by Zijin Bor Copper, a large copper mining company, acquired by Chinese Zijin Mining in 2018; significant gold extraction is developed around Majdanpek. Serbia notably manufactures intel smartphones named Tesla smartphones. Food industry is well known both regionally and internationally and is one of the strong points of the economy. Some of the international brand-names established production in Serbia: PepsiCo and Nestlé in food-processing sector; Coca-Cola (Belgrade), Heineken (Novi Sad) and Carlsberg (Bačka Palanka) in beverage industry; Nordzucker in sugar industry. Serbia's electronics industry had its peak in the 1980s and the industry today is only a third of what it was back then, but has witnessed a something of revival in last decade with investments of companies such as Siemens (wind turbines) in Subotica, Panasonic (lighting devices) in Svilajnac, and Gorenje (electrical home appliances) in Valjevo. The pharmaceutical industry in Serbia comprises a dozen manufacturers of generic drugs, of which Hemofarm in Vršac and Galenika in Belgrade, account for 80% of production volume. Domestic production meets over 60% of the local demand. Energy The energy sector is one of the largest and most important sectors to the country's economy. Serbia is a net exporter of electricity and importer of key fuels (such as oil and gas). Serbia has an abundance of coal, and significant reserves of oil and gas. Serbia's proven reserves of 5.5 billion tonnes of coal lignite are the fifth largest