BRUSSELS, May 16 (Reuters) - The European Union statistics office Eurostat said on Tuesday the unadjusted trade surplus of the euro zone in March increased to 30.9 billion euros from 17.8 billion euros in February. In March 2016 the bloc's trade surplus with the rest of the world was 28.2 billion euros. Euro zone trade - non seasonally adjusted data (all figures billions euros, unless stated): Flows Mar 16 Mar 17 Growth Jan-Mar 16 Jan-Mar 17 Growth Extra-EA19 exports 178.9 202.3 13% 486.9 536.5 10% Extra-EA19 imports 150.7 171.4 14% 435.7 489.9 12% Extra-EA19 trade 28.2 30.9 51.1 46.7 balance Intra-EA19 trade 150.5 168.1 12% 424.1 461.2 9% Euro zone trade - seasonally adjusted data (all figures billions euros, unless stated): Flows Jun 16 Jul 16 Aug 16 Sep16 Oct16 Nov16 Dec16 Jan17 Feb17 Mar17 Extra-EA19 exports 167.6 166.7 171.9 170.2 170.3 175.8 179.2 177.3 178.7 181.1 Extra-EA19 imports 145.6 147.2 148.6 147.4 150.6 153.5 155.9 161.9 159.9 158.0 Extra-EA19 trade 22.0 19.6 23.3 22.8 19.7 22.3 23.3 15.4 18.8 23.1 balance Intra-EA19 trade 141.8 141.1 143.4 142.4 143.6 147.0 147.3 148.0 149.1 149.9 (Reporting by Francesco Guarascio @fraguarascio)