0.81  250.
 0.79  500.
 0.78  600.
 0.77  700.
 0.73  800.
 0.70  900.
 0.67 1000.
 0.66 1100.
 0.61 1200.
 0.61 1300.
 0.55 1400.
 0.55 1450.
 0.53 1500.
 0.53 1550.
 0.49 1600.
 0.50 1640.