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

   Accident |
    Related |
   Factor 2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,804       98.04       98.04
          1 |          1        0.01       98.05
          2 |          1        0.01       98.06
          6 |          2        0.02       98.08
          7 |          1        0.01       98.09
         16 |          1        0.01       98.10
         99 |        190        1.90      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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