Frequencies for first 10,000 rows of zonenurs variable in nhamcsed2012 dataset :

Does ED use |
       zone |
   nursing? |      Freq.     Percent        Cum.
------------+-----------------------------------
      Blank |        152        1.52        1.52
    Unknown |        902        9.02       10.54
        Yes |      5,857       58.57       69.11
         No |      3,089       30.89      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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