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

   Previous |
   Speeding |
Convictions |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,032       60.32       60.32
          1 |      1,706       17.06       77.38
          2 |        737        7.37       84.75
          3 |        295        2.95       87.70
          4 |        173        1.73       89.43
          5 |         70        0.70       90.13
          6 |         48        0.48       90.61
          7 |         16        0.16       90.77
          8 |         12        0.12       90.89
          9 |          6        0.06       90.95
         10 |          1        0.01       90.96
         11 |          1        0.01       90.97
         13 |          1        0.01       90.98
         14 |          1        0.01       90.99
         16 |          1        0.01       91.00
         99 |        900        9.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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