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

     patient ethnicity |
           (unimputed) |      Freq.     Percent        Cum.
-----------------------+-----------------------------------
                 blank |      1,826       18.26       18.26
    hispanic or latino |      1,154       11.54       29.80
not hispanic or latino |      7,020       70.20      100.00
-----------------------+-----------------------------------
                 Total |     10,000      100.00

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