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

    RELATED |
   FACTOR 2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,935       99.35       99.35
          3 |          1        0.01       99.36
         15 |          1        0.01       99.37
         16 |          4        0.04       99.41
         17 |          5        0.05       99.46
         19 |          2        0.02       99.48
         99 |         52        0.52      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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