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

   Previous |
   Speeding |
Convictions |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,518       65.18       65.18
          1 |      1,767       17.67       82.85
          2 |        594        5.94       88.79
          3 |        262        2.62       91.41
          4 |        108        1.08       92.49
          5 |         44        0.44       92.93
          6 |         19        0.19       93.12
          7 |          8        0.08       93.20
          8 |          2        0.02       93.22
          9 |          2        0.02       93.24
         11 |          1        0.01       93.25
         99 |        675        6.75      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016