Frequencies for first 10,000 rows of ctother variable in nhamcsed2013 dataset :

  CT scan - |
      other |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,781       97.81       97.81
        Yes |        219        2.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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