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

   Previous |
   Speeding |
Convictions |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,415       64.15       64.15
          1 |      1,701       17.01       81.16
          2 |        656        6.56       87.72
          3 |        268        2.68       90.40
          4 |        113        1.13       91.53
          5 |         62        0.62       92.15
          6 |         13        0.13       92.28
          7 |         15        0.15       92.43
          8 |          7        0.07       92.50
          9 |          2        0.02       92.52
         10 |          3        0.03       92.55
         13 |          2        0.02       92.57
         99 |        743        7.43      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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