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

   Previous |
   Speeding |
Convictions |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,680       66.80       66.80
          1 |      1,666       16.66       83.46
          2 |        592        5.92       89.38
          3 |        259        2.59       91.97
          4 |         83        0.83       92.80
          5 |         52        0.52       93.32
          6 |         15        0.15       93.47
          7 |         10        0.10       93.57
          8 |          2        0.02       93.59
          9 |          1        0.01       93.60
         10 |          2        0.02       93.62
         99 |        638        6.38      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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