Frequencies for first 10,000 rows of ethnic variable in nhamcsopd1997 dataset :

        patient |
      ethnicity |      Freq.     Percent        Cum.
----------------+-----------------------------------
Hispanic Origin |      2,036       20.36       20.36
   Not Hispanic |      6,073       60.73       81.09
          Blank |      1,891       18.91      100.00
----------------+-----------------------------------
          Total |     10,000      100.00

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