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

  Chlamydia |
       test |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,934       99.34       99.34
        Yes |         66        0.66      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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