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

   previous |
   speeding |
convictions |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,119       81.19       81.19
          1 |      1,107       11.07       92.26
          2 |        245        2.45       94.71
          3 |         60        0.60       95.31
          4 |         21        0.21       95.52
          5 |          8        0.08       95.60
          6 |          1        0.01       95.61
          7 |          1        0.01       95.62
         99 |        369        3.69       99.31
        998 |         69        0.69      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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