Frequencies for first 10,000 rows of hgba variable in nhamcsopd2008 dataset :

     hgba1c |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,573       95.73       95.73
        yes |        427        4.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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