Frequencies for first 10,000 rows of regdiv variable in nhamcsed2011 dataset :

  Is ambulance |
     diversion |
      actively |
  managed on a |
regional level |
   versus each |
      hospital |      Freq.     Percent        Cum.
---------------+-----------------------------------
       Unknown |        376        3.76        3.76
Not applicable |      5,446       54.46       58.22
           Yes |      1,916       19.16       77.38
            No |      2,262       22.62      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016