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

   Previous |
   Speeding |
Convictions |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,101       61.01       61.01
          1 |      1,776       17.76       78.77
          2 |        742        7.42       86.19
          3 |        312        3.12       89.31
          4 |        152        1.52       90.83
          5 |         91        0.91       91.74
          6 |         40        0.40       92.14
          7 |         19        0.19       92.33
          8 |          8        0.08       92.41
          9 |          3        0.03       92.44
         10 |          6        0.06       92.50
         11 |          2        0.02       92.52
         12 |          1        0.01       92.53
         13 |          1        0.01       92.54
         99 |        746        7.46      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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