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

   Previous |
   Speeding |
Convictions |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,677       66.77       66.77
          1 |      1,652       16.52       83.29
          2 |        604        6.04       89.33
          3 |        255        2.55       91.88
          4 |         96        0.96       92.84
          5 |         50        0.50       93.34
          6 |         15        0.15       93.49
          7 |         12        0.12       93.61
          8 |          5        0.05       93.66
          9 |          3        0.03       93.69
         10 |          2        0.02       93.71
         99 |        629        6.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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