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

   Previous |
   Speeding |
Convictions |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,245       62.45       62.45
          1 |      1,649       16.49       78.94
          2 |        687        6.87       85.81
          3 |        311        3.11       88.92
          4 |        150        1.50       90.42
          5 |         71        0.71       91.13
          6 |         39        0.39       91.52
          7 |         19        0.19       91.71
          8 |          7        0.07       91.78
          9 |         10        0.10       91.88
         10 |          2        0.02       91.90
         11 |          3        0.03       91.93
         12 |          2        0.02       91.95
         14 |          3        0.03       91.98
         44 |          1        0.01       91.99
         99 |        801        8.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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