Under 15.5 classified drivers@1.8 BWIN 2 units USA GP

(after race - unlucky here with Rosberg and Liuzzi retiring within 10% distance )
lets try another shot at under,
USA GP also has dubious history as car smasher, of course its not so tight as Montreal but still.
Last straight gives a lots of strain to engines with that full gas part + many crashes in start chicane and infield tricky also, many spins there.

Looking at history we see that only 2002 broke trend , other years avg 10-11 cars finished only (excluding 2005 farce)
Basically in 4 of 5 normal races there went under 15.5 finishers by a margin