Frequencies for first 10,000 rows of gct variable in namcs2014 dataset :

  Gonorrhea |
      serum |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,950       99.50       99.50
        Yes |         50        0.50      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017