Frequencies for first 10,000 rows of enwall3 variable in sippp08putm1 dataset :

       EMP: Recipient of most |
       recent/only episode of |      Freq.     Percent        Cum.
------------------------------+-----------------------------------
              Not in Universe |      9,106       91.06       91.06
               Not applicable |        865        8.65       99.71
Taking care of a disabled but |         29        0.29      100.00
------------------------------+-----------------------------------
                        Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 Jan 2016