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

   Previous |
   Speeding |
Convictions |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,471       54.71       54.71
          1 |      1,778       17.78       72.49
          2 |        838        8.38       80.87
          3 |        504        5.04       85.91
          4 |        269        2.69       88.60
          5 |        158        1.58       90.18
          6 |         92        0.92       91.10
          7 |         59        0.59       91.69
          8 |         32        0.32       92.01
          9 |         21        0.21       92.22
         10 |         21        0.21       92.43
         11 |         10        0.10       92.53
         12 |          5        0.05       92.58
         13 |          3        0.03       92.61
         14 |          1        0.01       92.62
         15 |          1        0.01       92.63
         17 |          2        0.02       92.65
         18 |          1        0.01       92.66
         20 |          2        0.02       92.68
         22 |          1        0.01       92.69
         99 |        731        7.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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