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

   previous |
        dwi |
convictions |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,076       90.76       90.76
          1 |        317        3.17       93.93
          2 |         53        0.53       94.46
          3 |         14        0.14       94.60
          4 |          3        0.03       94.63
          5 |          1        0.01       94.64
          6 |          1        0.01       94.65
         99 |        484        4.84       99.49
        998 |         51        0.51      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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