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

   Accident |
    Related |
   Factor 2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,426       94.26       94.26
          1 |          7        0.07       94.33
          2 |          6        0.06       94.39
          3 |          6        0.06       94.45
          5 |          9        0.09       94.54
          6 |          3        0.03       94.57
          7 |          4        0.04       94.61
          8 |          2        0.02       94.63
         22 |         19        0.19       94.82
         23 |          1        0.01       94.83
         24 |          1        0.01       94.84
         26 |          3        0.03       94.87
         40 |          2        0.02       94.89
         43 |          1        0.01       94.90
         44 |          1        0.01       94.91
         45 |          1        0.01       94.92
         47 |          1        0.01       94.93
         48 |          2        0.02       94.95
         50 |          1        0.01       94.96
         99 |        504        5.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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