March 7 (Reuters) - Slovak industrial output rose by a real 17.5 percent year-on-year in January, up from a revised 9.0 percent growth rate in December, the Slovak Statistics Office said on Wednesday. INDUSTRIAL OUTPUT JAN 07 DEC 06 JAN 06 pct change yr/yr +17.5 +9.0 +6.3 NOTE. Analysts surveyed by Reuters had expected industrial output to have risen by 10.5 percent on an annual basis in January . The data are adjusted for the impact of number of working days. (Reporting by Martin Santa in Bratislava) ((For past economic data and analysts' forecasts, double click on )) ((Editing by Alan Crosby; martin.santa@reuters.com; Reuters Messaging: martin.santa.reuters.com@reuters.net; +421 2 5341 8402)) Keywords: SLOVAKIA ECONOMY/OUTPUT