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

    related |
factors (3) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,990       99.90       99.90
         14 |          2        0.02       99.92
         15 |          2        0.02       99.94
         23 |          1        0.01       99.95
         99 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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