Frequencies for first 10,000 rows of race variable in nhamcsed1997 dataset :

                patient race |      Freq.     Percent        Cum.
-----------------------------+-----------------------------------
                       White |      6,715       67.15       67.15
                       Black |      2,964       29.64       96.79
      Asian/Pacific Islander |        289        2.89       99.68
American Indian/Eskimo/Aleut |         32        0.32      100.00
-----------------------------+-----------------------------------
                       Total |     10,000      100.00

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