Frequencies for first 10,000 rows of physical variable in namcs2012 dataset :

    General |
   physical |
       exam |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      4,899       48.99       48.99
        Yes |      5,101       51.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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