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

      SPEED |
    RELATED |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,461       74.61       74.61
          1 |      2,183       21.83       96.44
          9 |        356        3.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016