Frequencies for first 10,000 rows of race variable in nhamcsopd2001 dataset :

                      patient race |      Freq.     Percent        Cum.
-----------------------------------+-----------------------------------
                        White Only |      6,403       64.03       64.03
       Black/African American only |      3,011       30.11       94.14
                        Asian only |        509        5.09       99.23
  Native Hawaiian/Oth Pac Isl only |         26        0.26       99.49
American Indian/Alaska Native only |         39        0.39       99.88
       More than one race reported |         12        0.12      100.00
-----------------------------------+-----------------------------------
                             Total |     10,000      100.00

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