Oct 27 (Reuters) - Slovak producer prices fell 0.7 percent month-on-month in September, below market expectations, putting the annual inflation rate for factory-gate costs (PPI) at 7.5 percent, data showed on Friday. PRODUCER PRICES SEPT 06 AUG 06 SEPT 05 pct change month/month -0.7 +0.6 +0.5 pct change year/year +7.5 +8.8 +5.8 NOTE. Analysts polled by Reuters had forecast a producer price rise of 0.1 percent on a monthly basis in September, and 8.4 percent on an annual basis <SK/ECON04> <SK/ECON09>. All data are subject to revision. (Reporting by Martin Santa, in Bratislava) ((For past economic data and analysts' forecasts, double click on <SK/ECON01>)) ((editorial@reuters.sk; Reuters Messaging: martin.santa.reuters.com@reuters.net; +421 2 5341 8402)) Keywords: ECONOMY SLOVAKIA PPI