Frequencies for first 10,000 rows of urgent variable in nhamcsed1995 dataset :

urgency of this |
          visit |      Freq.     Percent        Cum.
----------------+-----------------------------------
Urgent/emergent |      4,957       49.57       49.57
      Nonurgent |      5,043       50.43      100.00
----------------+-----------------------------------
          Total |     10,000      100.00

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