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

  Did your ED go on ambulance diversion |
                               in 2010? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                                  Blank |        106        1.06        1.06
                                Unknown |        638        6.38        7.44
Hospital's ED went on ambulance diversi |      4,448       44.48       51.92
Hospital's ED did not go on diversion i |      4,808       48.08      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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