Frequencies for classification variable in enfrep20130807 dataset :

Classificat |
        ion |      Freq.     Percent        Cum.
------------+-----------------------------------
    Class I |         22       16.06       16.06
   Class II |        101       73.72       89.78
  Class III |         14       10.22      100.00
------------+-----------------------------------
      Total |        137      100.00

by Jean Roth , jroth@nber.org , 18 Dec 2015