Frequencies for first 10,000 rows of leftama variable in nhamcsed2012 dataset :

   Left AMA |
   (against |
    medical |
    advice) |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,878       98.78       98.78
        Yes |        122        1.22      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016