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

  CT scan - |
      other |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,776       97.76       97.76
        Yes |        224        2.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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