Frequencies for first 10,000 rows of ehxfuo variable in nhamcsopd2006 dataset :

  if yes, does |
    it include |
       medical |
history/follow |
    -up notes? |      Freq.     Percent        Cum.
---------------+-----------------------------------
           Yes |      2,335       23.35       23.35
       Unknown |        147        1.47       24.82
Not applicable |      1,549       15.49       40.31
         Blank |      5,969       59.69      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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