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

   Previous |
   Recorded |
  Accidents |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,299       62.99       62.99
          1 |      1,841       18.41       81.40
          2 |        593        5.93       87.33
          3 |        210        2.10       89.43
          4 |         65        0.65       90.08
          5 |         25        0.25       90.33
          6 |          9        0.09       90.42
          7 |          2        0.02       90.44
          8 |          1        0.01       90.45
         10 |          1        0.01       90.46
         99 |        954        9.54      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016