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

    aggregated number of hours |
     hospital was on ambulance |
             diversion in 2007 |      Freq.     Percent        Cum.
-------------------------------+-----------------------------------
          0 hours on diversion |      3,903       39.03       39.03
       1-99 hours on diversion |      1,545       15.45       54.48
    100-499 hours on diversion |      1,265       12.65       67.13
500 or more hours on diversion |      1,660       16.60       83.73
  diversion data not available |      1,627       16.27      100.00
-------------------------------+-----------------------------------
                         Total |     10,000      100.00

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