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

   Accident |
    Related |
   Factor 3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,692       96.92       96.92
          3 |          1        0.01       96.93
          7 |          2        0.02       96.95
         40 |          1        0.01       96.96
         48 |          1        0.01       96.97
         99 |        303        3.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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