Frequencies for first 10,000 rows of regdiv variable in nhamcsed2009 dataset :

         is |
  ambulance |
  diversion |
   actively |
 managed on |
 a regional |
   level vs |
       each |
   hospital |
        ado |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |         89        0.89        0.89
         -8 |        595        5.95        6.84
         -7 |      3,968       39.68       46.52
          1 |      3,722       37.22       83.74
          2 |      1,626       16.26      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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