Frequencies for first 10,000 rows of race variable in nhamcsopd2002 dataset :

                      patient race |      Freq.     Percent        Cum.
-----------------------------------+-----------------------------------
                        White Only |      6,121       61.21       61.21
       Black/African American only |      3,322       33.22       94.43
                        Asian only |        430        4.30       98.73
  Native Hawaiian/Oth Pac Isl only |         49        0.49       99.22
American Indian/Alaska Native only |         43        0.43       99.65
       More than one race reported |         35        0.35      100.00
-----------------------------------+-----------------------------------
                             Total |     10,000      100.00

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