N.Z. UNEMPLOYMENT RATE 3.9 PCT IN DECEMBER QUARTER New Zealand's unemployment rate was 3.9 pct of the workforce in the quarter ended December 31, unchanged from a revised 3.9 pct (preliminary 3.8 pct) in the previous quarter but slightly above 3.8 pct in the year-earlier quarter, the Statistics Department said. The Department, citing the Household Labour Force Survey, said in a statement the number of unemployed in October- December 1986 was 61,500 against 60,500 in the September quarter and 60,500 a year earlier.