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

  Did your ED go on ambulance diversion |
                               in 2013? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                                Unknown |      1,829       18.29       18.29
Hospitals ED went on ambulance diversio |      4,179       41.79       60.08
Hospitals ED did not go on diversion in |      3,992       39.92      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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