Frequencies for first 10,000 rows of urgent variable in nhamcsed1996 dataset :

urgency of this |
          visit |      Freq.     Percent        Cum.
----------------+-----------------------------------
Urgent/emergent |      4,820       48.20       48.20
      Nonurgent |      5,180       51.80      100.00
----------------+-----------------------------------
          Total |     10,000      100.00

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