Frequencies for first 10,000 rows of raceun variable in nhamcsed2010 dataset :

                    Unimputed race |      Freq.     Percent        Cum.
-----------------------------------+-----------------------------------
                             blank |      1,135       11.35       11.35
                        white only |      6,627       66.27       77.62
       black/african american only |      1,898       18.98       96.60
                        asian only |        233        2.33       98.93
  native hawaiian/oth pac isl only |         51        0.51       99.44
american indian/alaska native only |         41        0.41       99.85
       more than one race reported |         15        0.15      100.00
-----------------------------------+-----------------------------------
                             Total |     10,000      100.00

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