CREATE TABLE table_21781 ("Level" FLOAT, "Shuttles" FLOAT, "Cumulative Shuttles" FLOAT, "Speed  ( km/h ) " TEXT, "Shuttle Time  ( seconds ) " TEXT, "Total level time  ( s ) " TEXT, "Distance  ( m ) " FLOAT, "Cumulative Distance  ( m ) " FLOAT, "Cumulative Time  ( min and seconds ) " TEXT)

What is the highest possible level?
SELECT MAX("Level") FROM table_21781
SELECT MAX("Level") FROM "table_21781"