Frequencies for first 10,000 rows of medscrnx variable in nhamcsed2003 dataset :

    medical |
  screening |
       exam |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      3,418       34.18       34.18
        yes |      6,582       65.82      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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