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

   Accident |
    Related |
   Factor 2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,839       98.39       98.39
          1 |          1        0.01       98.40
          2 |          1        0.01       98.41
          7 |          1        0.01       98.42
         16 |          3        0.03       98.45
         99 |        155        1.55      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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