Frequencies for first 10,000 rows of cf3 variable in accident dataset :

    RELATED |
   FACTOR 3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,981       99.81       99.81
          3 |          1        0.01       99.82
         14 |          1        0.01       99.83
         19 |          1        0.01       99.84
         23 |          2        0.02       99.86
         99 |         14        0.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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