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

   Accident |
    Related |
   Factor 2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,686       96.86       96.86
          1 |          4        0.04       96.90
          2 |          1        0.01       96.91
          3 |          6        0.06       96.97
          5 |          2        0.02       96.99
          6 |          5        0.05       97.04
          7 |          5        0.05       97.09
          8 |          4        0.04       97.13
         20 |          2        0.02       97.15
         22 |         37        0.37       97.52
         23 |          1        0.01       97.53
         24 |          5        0.05       97.58
         25 |          1        0.01       97.59
         26 |         12        0.12       97.71
         28 |          3        0.03       97.74
         29 |          1        0.01       97.75
         43 |          4        0.04       97.79
         44 |          3        0.03       97.82
         45 |          4        0.04       97.86
         60 |          5        0.05       97.91
         99 |        209        2.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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