Frequencies for first 10,000 rows of ehxfue variable in nhamcsed2006 dataset :

  if yes, does |
    it include |
       medical |
history/follow |
    -up notes? |      Freq.     Percent        Cum.
---------------+-----------------------------------
           yes |      3,110       31.10       31.10
            no |        434        4.34       35.44
       unknown |        170        1.70       37.14
not applicable |      1,502       15.02       52.16
         blank |      4,784       47.84      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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