0.78  250.
 0.55  500.
 0.54  750.
 0.52 1000.
 0.48 1250.
 0.49 1500.
 0.46 1750.
 0.39 2000.
 0.39 2250.
 0.39 2500.
 0.39 2750.
 0.38 3000.
 0.36 3100.
 0.35 3200.
 0.29 3300.
 0.30 3400.
 0.38 3500.
 0.43 3600.
 0.45 3700.
 0.48 3800.
 0.50 3900.