Frequencies for prev_sus variable in vehicle dataset :

   PREVIOUS |
SUSPENSIONS |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        703       92.02       92.02
          1 |          3        0.39       92.41
          2 |          3        0.39       92.80
         99 |         53        6.94       99.74
          . |          2        0.26      100.00
------------+-----------------------------------
      Total |        764      100.00

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