Frequencies for first 10,000 rows of otherxry variable in nhamcsed1995 dataset :

other x-ray |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,944       89.44       89.44
          1 |      1,056       10.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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