Frequencies for first 10,000 rows of raceun variable in nhamcsed2014 dataset :

                    Unimputed race |      Freq.     Percent        Cum.
-----------------------------------+-----------------------------------
                             Blank |      2,736       27.36       27.36
                        White Only |      4,592       45.92       73.28
       Black/African American Only |      2,357       23.57       96.85
                        Asian Only |        240        2.40       99.25
  Native Hawaiian/Oth Pac Isl Only |         24        0.24       99.49
American Indian/Alaska Native Only |         31        0.31       99.80
       More than one race reported |         20        0.20      100.00
-----------------------------------+-----------------------------------
                             Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 11 Apr 2017