Frequencies for first 10,000 rows of mri variable in namcs2007 dataset :

        mri |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,864       98.64       98.64
        yes |        136        1.36      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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