CREATE TABLE table_15847 ("Order Year" TEXT, "Manufacturer" TEXT, "Model" TEXT, "Fleet Series  ( Quantity ) " TEXT, "Powertrain  ( Engine/Transmission ) " TEXT, "Fuel Propulsion" TEXT)

who is the manufacturer for the order year 1998?
SELECT "Manufacturer" FROM table_15847 WHERE "Order Year" = '1998'
SELECT "Manufacturer" FROM "table_15847" WHERE "Order Year" = '1998'