Frequencies for first 10,000 rows of emt variable in nhamcsed2007 dataset :

   emt seen |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,105       91.05       91.05
        yes |        895        8.95      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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