Frequencies for first 10,000 rows of raceun variable in namcs2013 dataset :

          Patient race - unimputed |      Freq.     Percent        Cum.
-----------------------------------+-----------------------------------
                             Blank |      2,848       28.48       28.48
                        White Only |      6,056       60.56       89.04
       Black/African American Only |        772        7.72       96.76
                        Asian Only |        266        2.66       99.42
  Native Hawaiian/Oth Pac Isl Only |         12        0.12       99.54
American Indian/Alaska Native Only |         18        0.18       99.72
       More than one race reported |         28        0.28      100.00
-----------------------------------+-----------------------------------
                             Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017