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

   Previous |
   Speeding |
Convictions |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,204       72.04       72.04
          1 |      1,404       14.04       86.08
          2 |        488        4.88       90.96
          3 |        191        1.91       92.87
          4 |         69        0.69       93.56
          5 |         31        0.31       93.87
          6 |          6        0.06       93.93
          7 |          4        0.04       93.97
          8 |          4        0.04       94.01
         10 |          1        0.01       94.02
         12 |          1        0.01       94.03
         99 |        597        5.97      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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