Frequencies for first 10,000 rows of raceun variable in namcs2012 dataset :

          Patient race - unimputed |      Freq.     Percent        Cum.
-----------------------------------+-----------------------------------
                             Blank |      3,217       32.17       32.17
                        White Only |      5,818       58.18       90.35
       Black/African American Only |        601        6.01       96.36
                        Asian Only |        320        3.20       99.56
  Native Hawaiian/Oth Pac Isl Only |         13        0.13       99.69
American Indian/Alaska Native Only |          9        0.09       99.78
       More than one race reported |         22        0.22      100.00
-----------------------------------+-----------------------------------
                             Total |     10,000      100.00

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