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

Does ED use |
       zone |
   nursing? |      Freq.     Percent        Cum.
------------+-----------------------------------
    Unknown |      1,136       11.36       11.36
        Yes |      7,088       70.88       82.24
         No |      1,776       17.76      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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