Frequencies for country variable in enfrep20170517 dataset :

      Country |      Freq.     Percent        Cum.
--------------+-----------------------------------
       Canada |          2        2.60        2.60
United States |         75       97.40      100.00
--------------+-----------------------------------
        Total |         77      100.00

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