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

   previous |
        dwi |
convictions |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,368       93.68       93.68
          1 |        196        1.96       95.64
          2 |         30        0.30       95.94
          3 |          5        0.05       95.99
          4 |          1        0.01       96.00
         99 |        339        3.39       99.39
        998 |         61        0.61      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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