Frequencies for first 10,000 rows of prev_acc variable in vehicle dataset :

   PREVIOUS |
  ACCIDENTS |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,698       76.98       76.98
          1 |      1,389       13.89       90.87
          2 |        254        2.54       93.41
          3 |         50        0.50       93.91
          4 |         11        0.11       94.02
          5 |          4        0.04       94.06
          6 |          2        0.02       94.08
         99 |        592        5.92      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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