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

   if yes, are |
  out of range |
        levels |
  highlighted? |      Freq.     Percent        Cum.
---------------+-----------------------------------
           Yes |      2,655       26.55       26.55
            No |        640        6.40       32.95
       Unknown |        221        2.21       35.16
Not applicable |      6,006       60.06       95.22
         Blank |        478        4.78      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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