Frequencies for cf1 variable in accident dataset :

   Accident |
    Related |
   Factor 1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        477       98.15       98.15
          2 |          3        0.62       98.77
          3 |          1        0.21       98.97
          6 |          2        0.41       99.38
          7 |          1        0.21       99.59
         15 |          1        0.21       99.79
         16 |          1        0.21      100.00
------------+-----------------------------------
      Total |        486      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016