Frequencies for first 10,000 rows of prov1955 variable in pos1994 dataset :

       330d |
endocrinolo |
         gy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,798       87.98       87.98
          N |        881        8.81       96.79
          Y |        321        3.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017