Frequencies for first 10,000 rows of cf2 variable in accident dataset :

   Accident |
    Related |
   Factor 2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,822       98.22       98.22
          4 |          2        0.02       98.24
          5 |          4        0.04       98.28
          6 |          1        0.01       98.29
          7 |          1        0.01       98.30
         16 |          4        0.04       98.34
         18 |          2        0.02       98.36
         99 |        164        1.64      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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