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

   Previous |
   Recorded |
  Accidents |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,586       75.86       75.86
          1 |      1,456       14.56       90.42
          2 |        252        2.52       92.94
          3 |         58        0.58       93.52
          4 |         14        0.14       93.66
          5 |          4        0.04       93.70
          7 |          1        0.01       93.71
         99 |        629        6.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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