Frequencies for cf1 variable in accident dataset :

   Accident |
    Related |
   Factor 1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        454       92.84       92.84
          1 |          1        0.20       93.05
         22 |         18        3.68       96.73
         23 |          2        0.41       97.14
         24 |          2        0.41       97.55
         26 |          1        0.20       97.75
         29 |          1        0.20       97.96
         40 |          1        0.20       98.16
         41 |          1        0.20       98.36
         44 |          2        0.41       98.77
         45 |          1        0.20       98.98
         46 |          5        1.02      100.00
------------+-----------------------------------
      Total |        489      100.00

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