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

   Previous |
   Speeding |
Convictions |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,158       61.58       61.58
          1 |      1,771       17.71       79.29
          2 |        700        7.00       86.29
          3 |        347        3.47       89.76
          4 |        177        1.77       91.53
          5 |         79        0.79       92.32
          6 |         40        0.40       92.72
          7 |         22        0.22       92.94
          8 |          8        0.08       93.02
          9 |          2        0.02       93.04
         10 |          6        0.06       93.10
         11 |          2        0.02       93.12
         12 |          3        0.03       93.15
         16 |          1        0.01       93.16
         99 |        684        6.84      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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