Frequencies for first 10,000 rows of prov1955 variable in pos1995 dataset :

       330d |
endocrinolo |
         gy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,884       88.84       88.84
          N |        818        8.18       97.02
          Y |        298        2.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016