IM-Rate data for Christchurch subsoil class D Sa(2p0s)
    9            (2G10.3)      1.00
  0.235485  0.032189
  0.361505  0.013863
  0.585568  0.004463
  0.767307  0.002107
  0.962342  0.001026
  1.250405  0.000404
  1.474687  0.000201
  1.716728  0.000100
  2.062149  0.000040