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

   Previous |
   Recorded |
  Accidents |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,538       75.38       75.38
          1 |      1,509       15.09       90.47
          2 |        263        2.63       93.10
          3 |         37        0.37       93.47
          4 |         10        0.10       93.57
          5 |          4        0.04       93.61
          6 |          1        0.01       93.62
         99 |        638        6.38      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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