Frequencies for first 10,000 rows of psa variable in namcs2011 dataset :

   PSA test |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,796       97.96       97.96
        Yes |        204        2.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016