14
  10.0    100.0
  100.0	  180.0
  180.0	  240.0
  240.0	  300.0
  300.0	  350.0
  350.0   400.0
  400.0   460.0
  460.0	  600.0
  600.0   680.0
  680.0   780.0
  780.0   870.0
  870.0   970.0
  970.0   1220.0
  1220.0  1400.0