Frequencies for mcycl_ds variable in vehnit dataset :

         CC |
DISPLACEMEN |
          T |      Freq.     Percent        Cum.
------------+-----------------------------------
        599 |          1        0.08        0.08
        929 |          1        0.08        0.16
       1099 |          1        0.08        0.24
       1130 |          1        0.08        0.31
       1312 |          1        0.08        0.39
       1450 |          3        0.24        0.63
       1520 |          1        0.08        0.71
       1584 |          3        0.24        0.94
       1783 |          1        0.08        1.02
       9999 |         79        6.21        7.23
          . |      1,180       92.77      100.00
------------+-----------------------------------
      Total |      1,272      100.00

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