Frequencies for first 10,000 rows of racer3 variable in mort1975 dataset :

     racer3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,461       74.61       74.61
          2 |      2,298       22.98       97.59
          3 |        241        2.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015