Frequencies for first 10,000 rows of zonenurs variable in nhamcsed2013 dataset :

Does ED use |
       zone |
   nursing? |      Freq.     Percent        Cum.
------------+-----------------------------------
      Blank |         98        0.98        0.98
    Unknown |      1,032       10.32       11.30
        Yes |      7,055       70.55       81.85
         No |      1,815       18.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016