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

   Previous |
   Speeding |
Convictions |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,488       54.88       54.88
          1 |      1,761       17.61       72.49
          2 |        814        8.14       80.63
          3 |        513        5.13       85.76
          4 |        288        2.88       88.64
          5 |        141        1.41       90.05
          6 |        106        1.06       91.11
          7 |         56        0.56       91.67
          8 |         33        0.33       92.00
          9 |         15        0.15       92.15
         10 |         17        0.17       92.32
         11 |         12        0.12       92.44
         12 |          6        0.06       92.50
         13 |          3        0.03       92.53
         14 |          1        0.01       92.54
         15 |          2        0.02       92.56
         19 |          2        0.02       92.58
         20 |          1        0.01       92.59
         99 |        741        7.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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