Frequencies for first 10,000 rows of ambdiv variable in nhamcsed2010 dataset :

      Did your hospital go on ambulance |
                     diversion in 2009? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                                  blank |         40        0.40        0.40
                                unknown |        869        8.69        9.09
hospital's ed went on diversion in 2009 |      4,783       47.83       56.92
hospital's ed did not go on diversion i |      4,308       43.08      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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