Frequencies for first 10,000 rows of erangeo variable in nhamcsopd2008 dataset :

   if yes, are |
  out of range |
        levels |
  highlighted? |      Freq.     Percent        Cum.
---------------+-----------------------------------
         blank |        309        3.09        3.09
       unknown |        333        3.33        6.42
not applicable |      2,084       20.84       27.26
           yes |      6,979       69.79       97.05
            no |        295        2.95      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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