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

    related |
factors (3) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,984       99.84       99.84
         15 |          2        0.02       99.86
         23 |          3        0.03       99.89
         99 |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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