Frequencies for first 10,000 rows of medscrnx variable in nhamcsed2002 dataset :

    medical |
  screening |
       exam |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,367       33.67       33.67
          1 |      6,633       66.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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