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

   previous |
   speeding |
convictions |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,189       81.89       81.89
          1 |      1,051       10.51       92.40
          2 |        221        2.21       94.61
          3 |         63        0.63       95.24
          4 |         14        0.14       95.38
          5 |          5        0.05       95.43
          6 |          1        0.01       95.44
         99 |        392        3.92       99.36
        998 |         64        0.64      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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