Frequencies for first 10,000 rows of rn variable in nhamcsed2003 dataset :

         rn |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      1,151       11.51       11.51
        yes |      8,849       88.49      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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