Frequencies for first 10,000 rows of race variable in nhamcsopd1993 dataset :

                patient race |      Freq.     Percent        Cum.
-----------------------------+-----------------------------------
                       White |      6,324       63.24       63.24
                       Black |      3,341       33.41       96.65
      Asian/Pacific Islander |        310        3.10       99.75
American Indian/Eskimo/Aleut |         25        0.25      100.00
-----------------------------+-----------------------------------
                       Total |     10,000      100.00

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