Frequencies for first 10,000 rows of rectype variable in natl1993 dataset :

Record type |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,278       72.78       72.78
          2 |      2,722       27.22      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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