Frequencies for first 10,000 rows of urgent variable in nhamcsed1994 dataset :

urgency of this |
          visit |      Freq.     Percent        Cum.
----------------+-----------------------------------
Urgent/emergent |      5,039       50.39       50.39
      Nonurgent |      4,961       49.61      100.00
----------------+-----------------------------------
          Total |     10,000      100.00

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