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

   Previous |
   Recorded |
  Accidents |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,503       75.03       75.03
          1 |      1,381       13.81       88.84
          2 |        275        2.75       91.59
          3 |         52        0.52       92.11
          4 |          6        0.06       92.17
          5 |          3        0.03       92.20
         99 |        780        7.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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