CREATE TABLE table_5272 ("Order Year" TEXT, "Manufacturer" TEXT, "Model" TEXT, "Fleet  ( Qty. ) " TEXT, "Propulsion" TEXT, "Length  ( ft. ) " FLOAT)

What is the Propulsion for the model offered in 2003-2004 by neoplan usa?
SELECT "Propulsion" FROM table_5272 WHERE "Order Year" = '2003-2004' AND "Manufacturer" = 'neoplan usa'
SELECT "Propulsion" FROM "table_5272" WHERE "Manufacturer" = 'neoplan usa' AND "Order Year" = '2003-2004'