Frequencies for first 10,000 rows of regdiv variable in nhamcsed2008 dataset :

  is ambulance |
     diversion |
      actively |
  managed on a |
regional level |
       vs each |
  hospital ado |      Freq.     Percent        Cum.
---------------+-----------------------------------
         blank |        174        1.74        1.74
       unknown |        706        7.06        8.80
not applicable |      3,903       39.03       47.83
           yes |      3,629       36.29       84.12
            no |      1,588       15.88      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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