Frequencies for first 10,000 rows of cf3 variable in accident dataset :

   Accident |
    Related |
   Factor 3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,493       94.93       94.93
          3 |          1        0.01       94.94
         47 |          1        0.01       94.95
         49 |          1        0.01       94.96
         99 |        504        5.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016