Frequencies for classification variable in enfrep20170517 dataset :

Classificat |
        ion |      Freq.     Percent        Cum.
------------+-----------------------------------
    Class I |         12       15.58       15.58
   Class II |         55       71.43       87.01
  Class III |         10       12.99      100.00
------------+-----------------------------------
      Total |         77      100.00

by Jean Roth , jroth@nber.org , 18 May 2017