SEOUL, May 1 (Reuters) - Following are South Korea"s preliminary export and import figures for April, released by the government on Saturday(rounded): Apr *Mar Balance ($ billion) +0.39 +4.13 Exports ($ billion) 51.19 53.78 (% growth vs yr ago) +41.1 +16.5 Imports ($ billion) 50.80 49.65 (% growth vs yr ago) +33.9 +18.8 Avg exports per working day +29.4 +16.5 (% growth vs yr ago) * Revised on Apr. 15 NOTES: - April exports expanded 41.1% from a year earlier, the sharpest increase since Jan. 2011 and extending the growth to a sixth straight month, government data showed on Saturday. - Reuters poll: April exports were seen expanding 44.0% from a year earlier, the median forecast in a poll of 14 economists showed. - There were 24 working days in April, two days more than the comparable month of 2020. (Reporting by Joori Roh)