IM-Rate data for Wellington Sa(1p0s)
    9            (2G10.3)      1.00
  0.007077  0.032189
  0.018911  0.013863
  0.053990  0.004463
  0.096614  0.002107
  0.152250  0.001026
  0.242026  0.000404
  0.322052  0.000201
  0.412883  0.000100
  0.550772  0.000040