expdata :=
 [[4.239769836,13559.75137], [.5598281410,9.732681394],
  [.9833881570,22.79237389], [3.101811228,1456.580538],
  [.7780114740,15.94091435], [1.935268542,147.1519294],
  [.6478579130,12.54482861], [1.747738912,101.7758552],
  [4.083798094,9986.189916], [2.311897757,309.0945326],
  [.075580427351,3.775360665], [.4919153978,9.239410976],
  [2.774459250,765.6868895], [.1870277144,5.016250738],
  [.8688155065,17.90012576], [2.569767624,512.2432485],
  [2.398130487,366.5614576], [.1635927303,4.322895932],
  [2.197614913,246.8497673], [.9350282485,20.79712409],
  [4.943594472,53914.11084]];