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

    RELATED |
   FACTOR 2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,862       98.62       98.62
          3 |          2        0.02       98.64
         14 |          6        0.06       98.70
         15 |          7        0.07       98.77
         19 |         15        0.15       98.92
         20 |          2        0.02       98.94
         99 |        106        1.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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