CREATE TABLE table_25244 ("Year" TEXT, "Date" TEXT, "Driver" TEXT, "Team" TEXT, "Manufacturer" TEXT, "Laps" TEXT, "Miles  ( km ) " TEXT, "Race Time" TEXT, "Average Speed  ( mph ) " TEXT, "Report" TEXT)

What's the average mph of 1964?
SELECT "Average Speed (mph)" FROM table_25244 WHERE "Year" = '1964'
SELECT "Average Speed (mph)" FROM "table_25244" WHERE "Year" = '1964'