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

   Previous |
        DWI |
Convictions |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,631       86.31       86.31
          1 |        520        5.20       91.51
          2 |         82        0.82       92.33
          3 |         18        0.18       92.51
          4 |          2        0.02       92.53
          5 |          1        0.01       92.54
         99 |        746        7.46      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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