Frequencies for first 10,000 rows of ch613 variable in morg07 dataset :

      ch613 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,482       44.82       44.82
          1 |      1,621       16.21       61.03
          . |      3,897       38.97      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Mar 2017