Frequencies for first 10,000 rows of race variable in nhamcsopd1994 dataset :

                patient race |      Freq.     Percent        Cum.
-----------------------------+-----------------------------------
                       White |      6,434       64.34       64.34
                       Black |      3,279       32.79       97.13
      Asian/Pacific Islander |        253        2.53       99.66
American Indian/Eskimo/Aleut |         34        0.34      100.00
-----------------------------+-----------------------------------
                       Total |     10,000      100.00

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