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

    rectype |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,299       72.99       72.99
          2 |      2,701       27.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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