Frequencies for first 10,000 rows of poolnurs variable in nhamcsed2014 dataset :

Does ED use |
       pool |
   nursing? |      Freq.     Percent        Cum.
------------+-----------------------------------
    Unknown |        886        8.86        8.86
        Yes |      6,187       61.87       70.73
         No |      2,927       29.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 11 Apr 2017