Frequencies for unittype variable in vehnit dataset :

  UNIT TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |        657       51.65       51.65
          3 |        587       46.15       97.80
          4 |         28        2.20      100.00
------------+-----------------------------------
      Total |      1,272      100.00

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