#    casualty          pdf          cdf
      18.1513   0.00684392        0.002
      18.4435    0.0239537        0.009
      18.7357    0.0513294        0.024
      19.0279    0.0992369        0.053
      19.3202     0.318242        0.146
      19.6124     0.222428        0.211
      19.9046     0.793895        0.443
      20.1969     0.526982        0.597
      20.4891   0.00684392        0.599
      20.7813     0.304555        0.688
      21.0736            0        0.688
      21.3658     0.102659        0.718
       21.658     0.205318        0.778
      21.9502    0.0342196        0.788
      22.2425    0.0239537        0.795
      22.5347     0.126613        0.832
      22.8269    0.0615953         0.85
      23.1192     0.112925        0.883
      23.4114     0.106081        0.914
      23.7036     0.136878        0.954
      23.9959    0.0752832        0.976
      24.2881    0.0410635        0.988
      24.5803    0.0273757        0.996
      24.8725   0.00684392        0.998
      25.1648   0.00684392            1