FINNISH ECONOMIC GROWTH PUT AT THREE PCT IN 1987 Finland's gross national product is expected to rise by three pct in 1987 against two pct in 1986 and inflation will be unchanged at about 3.5 pct, the private business survey office ETLA predicted. Unemployment in 1987 is put at 5.5 pct, in line with last year, the office predicted in its regular review. The balance of payments would show a five billion markka deficit in 1987, against a 4.2 billion deficit in 1986.