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

   Previous |
        DWI |
Convictions |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,704       87.04       87.04
          1 |        542        5.42       92.46
          2 |        102        1.02       93.48
          3 |         18        0.18       93.66
          4 |          3        0.03       93.69
          5 |          1        0.01       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