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

   Previous |
   Recorded |
  Accidents |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,687       76.87       76.87
          1 |      1,351       13.51       90.38
          2 |        249        2.49       92.87
          3 |         45        0.45       93.32
          4 |          8        0.08       93.40
         99 |        660        6.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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