Frequencies for unittype variable in vehnit dataset :

  UNIT TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |        836       56.45       56.45
          3 |        614       41.46       97.91
          4 |         31        2.09      100.00
------------+-----------------------------------
      Total |      1,481      100.00

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