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

    RELATED |
   FACTOR 2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,967       99.67       99.67
          3 |          1        0.01       99.68
          4 |          2        0.02       99.70
          6 |          2        0.02       99.72
         14 |          4        0.04       99.76
         15 |          1        0.01       99.77
         19 |          3        0.03       99.80
         22 |          3        0.03       99.83
         23 |          9        0.09       99.92
         99 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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