Frequencies for first 10,000 rows of urgent variable in nhamcsed1997 dataset :

immediacy with which |
   patient should be |
                seen |      Freq.     Percent        Cum.
---------------------+-----------------------------------
   Unknown/no triage |      2,041       20.41       20.41
Less than 15 minutes |      2,027       20.27       40.68
      15- 60 minutes |      3,039       30.39       71.07
   >1 hour - 2 hours |      1,761       17.61       88.68
 >2 hours - 24 hours |      1,132       11.32      100.00
---------------------+-----------------------------------
               Total |     10,000      100.00

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