CREATE TABLE table_204_605 (id DECIMAL, "date" TEXT, "round" TEXT, "opponents" TEXT, "h / a" TEXT, "result\ f-a" TEXT, "scorers" TEXT, "attendance" DECIMAL)

what is the attendance of the last uefa cup match on 20 march 1985 ?
SELECT "attendance" FROM table_204_605 WHERE "date" = '20 march 1985'
SELECT "attendance" FROM "table_204_605" WHERE "date" = '20 march 1985'