Frequencies for first 10,000 rows of raceun variable in nhamcsed2011 dataset :

                    Unimputed race |      Freq.     Percent        Cum.
-----------------------------------+-----------------------------------
                             Blank |      1,279       12.79       12.79
                        White Only |      6,649       66.49       79.28
       Black/African American Only |      1,746       17.46       96.74
                        Asian Only |        157        1.57       98.31
  Native Hawaiian/Oth Pac Isl Only |         22        0.22       98.53
American Indian/Alaska Native Only |         43        0.43       98.96
       More than one race reported |        104        1.04      100.00
-----------------------------------+-----------------------------------
                             Total |     10,000      100.00

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