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

        VIN |
Chassis-Tru |
         ck |      Freq.     Percent        Cum.
------------+-----------------------------------
         99 |      4,453       44.53       44.53
          . |      5,547       55.47      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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