Frequencies for mcycl_ds variable in person dataset :

 Motorcycle |
         CC |
Displacemen |
          t |      Freq.     Percent        Cum.
------------+-----------------------------------
        123 |          2        0.15        0.15
        400 |          1        0.08        0.23
        653 |          1        0.08        0.30
       9999 |        928       70.20       70.50
          . |        390       29.50      100.00
------------+-----------------------------------
      Total |      1,322      100.00

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