Frequencies for first 10,000 rows of rectype variable in natl1973 dataset :

Record type |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,903       79.03       79.03
          2 |      2,097       20.97      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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