Frequencies for mcycl_ds variable in vehnit dataset :

         CC |
DISPLACEMEN |
          T |      Freq.     Percent        Cum.
------------+-----------------------------------
        250 |          1        0.07        0.07
        805 |          1        0.07        0.14
        988 |          1        0.07        0.20
       1340 |          1        0.07        0.27
       9999 |        109        7.36        7.63
          . |      1,368       92.37      100.00
------------+-----------------------------------
      Total |      1,481      100.00

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