Frequencies for first 10,000 rows of raceun variable in nhamcsopd2011 dataset :

                    Unimputed race |      Freq.     Percent        Cum.
-----------------------------------+-----------------------------------
                             Blank |      1,651       16.51       16.51
                        White Only |      5,751       57.51       74.02
       Black/African American Only |      1,876       18.76       92.78
                        Asian Only |        394        3.94       96.72
  Native Hawaiian/Oth Pac Isl Only |         71        0.71       97.43
American Indian/Alaska Native Only |         16        0.16       97.59
       More than one race reported |        241        2.41      100.00
-----------------------------------+-----------------------------------
                             Total |     10,000      100.00

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