(updates with central banker quotes) By Peter Laca BRATISLAVA, Nov 15 (Reuters) - Slovakia's economy expanded by a record 9.8 percent in the third quarter, putting the country among the ranks of the world's fastest growing nations and boosting the crown to record levels against the euro. The preliminary flash estimate of third quarter GDP, released by the Statistics Office on Wednesday, was well above the market forecast of a 6.6 percent year-on-year rise. Slovakia has been showing one of the highest growth rates in the European Union since it joined the bloc in 2004, thanks to accelerating household consumption and rising investments in the key automotive industry. As with other neighbouring central European economies, it has also benefitted from an upturn in the economies of western Europe, especially Germany. "The third quarter data clearly confirmed Slovakia's leading position in the central European region, with economic growth comparable with fast expanding economies of China and the Baltic states," said Martin Lenko, an analyst at VUB Bank, a unit of Italy's Banca Intesa. The Statistics Office said in a statement that the latest GDP growth figures, up from 6.7 percent in the second quarter, were influenced by continued foreign demand and growth in inventories of materials and finished products. It did not release any breakdown of the third-quarter GDP structure, but the strong headline number pushed the crown to an all-time high of 35.720 per euro. The record crown rate was 7.7 percent above parity in the exchange rate mechanism 2 (ERM 2), the precursor to the euro which Slovakia joined last year as part of its plan to adopt the European single currency in 2009. MARKET AT ODDS Central bank Governor Ivan Sramko said that while the data were well above expectations, the economy was healthy and could continue its fast pace growth into 2007, though more detailed data was needed to analyse the structure and any policy impact. "From the few details that are available, we consider the growth to be healthy because the dominant part ... in consumption was foreign demand and not the demand that we see as a risk for inflation," he said after attending a government meeting. "But if we understood the main source of growth correctly, then the economy is likely to maintain similar growth at least in the first half of next year," he added. The lack of details also put market watchers at odds over the implications of the strong economic growth. ING Bank senior economist Lucia Steklacova said healthy growth structure would give room for more crown firming, which would reduce the need to tighten monetary policy. "This figure means that growth is healthy, and surprisingly high imports in the previous months will translate into exports in the future, and not into consumption, as some may have feared," she said. But others, including Danske Bank analysts, said the strong GDP readings meant the economy was overheating and that the central bank will have to raise rates further to tame upward pressure on shop prices. The central bank has raised interest rates by 175 basis points in four steps this year, bringing the key two-week repo rate to 4.75 percent, to fend off inflation risks stemming from high energy prices and rising domestic demand. The central bank will be in a difficult position when assessing its interest rates at the end of November as it will have to weigh the strong headline GDP figure against signs of improving structure, economists said. "Economic growth has jumped through the roof, but the structure is changing in favour of non-inflationary growth as it will be driven by foreign demand," said Miroslav Plojhar, the chief economist at Citibank Czech Republic. (Additional reporting by Martin Santa) ((Reporting by Peter Laca, editing by Stephen Nisbet; Reuters Messaging: peter.laca.reuters.com@reuters.net; +40 21 315 8320;)) Keywords: ECONOMY SLOVAKIA GROWTH