Frequencies for first 10,000 rows of raceun variable in nhamcsopd2010 dataset :

          patient race (unimputed) |      Freq.     Percent        Cum.
-----------------------------------+-----------------------------------
                             blank |      1,153       11.53       11.53
                        white only |      6,896       68.96       80.49
       black/african american only |      1,555       15.55       96.04
                        asian only |        191        1.91       97.95
  native hawaiian/oth pac isl only |        111        1.11       99.06
american indian/alaska native only |         32        0.32       99.38
       more than one race reported |         62        0.62      100.00
-----------------------------------+-----------------------------------
                             Total |     10,000      100.00

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