Frequencies for first 10,000 rows of rectype variable in natl1999 dataset :

Record type |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,139       71.39       71.39
          2 |      2,861       28.61      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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