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

          patient race (unimputed) |      Freq.     Percent        Cum.
-----------------------------------+-----------------------------------
                             blank |      1,178       11.78       11.78
                        white only |      6,339       63.39       75.17
       black/african american only |      2,172       21.72       96.89
                        asian only |        192        1.92       98.81
  native hawaiian/oth pac isl only |         25        0.25       99.06
american indian/alaska native only |         48        0.48       99.54
       more than one race reported |         46        0.46      100.00
-----------------------------------+-----------------------------------
                             Total |     10,000      100.00

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