Frequencies for unittype variable in vehnit dataset :

  UNIT TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |        583       52.24       52.24
          3 |        508       45.52       97.76
          4 |         25        2.24      100.00
------------+-----------------------------------
      Total |      1,116      100.00

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