Frequencies for model variable in vehnit dataset :

      model |      Freq.     Percent        Cum.
------------+-----------------------------------
         16 |          1       33.33       33.33
        401 |          1       33.33       66.67
        899 |          1       33.33      100.00
------------+-----------------------------------
      Total |          3      100.00

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