Frequencies for first 10,000 rows of rectype variable in natl1974 dataset :

Record type |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,860       78.60       78.60
          2 |      2,140       21.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 Jan 2016