Frequencies for first 10,000 rows of otherxry variable in nhamcsed1998 dataset :

other x-ray |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,965       89.65       89.65
          1 |      1,035       10.35      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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