Frequencies for first 10,000 rows of veteran variable in morg86 dataset :

                   Veteran status |      Freq.     Percent        Cum.
----------------------------------+-----------------------------------
          Vietnam Era (8/64-4/75) |        419        4.19        4.19
           Korean War (6/50-1/55) |        244        2.44        6.63
         World War II (9/40-7/47) |        527        5.27       11.90
         World War I (4/17-11/18) |         10        0.10       12.00
Other Service (all Other Periods) |        351        3.51       15.51
                       Nonveteran |      8,440       84.40       99.91
                                . |          9        0.09      100.00
----------------------------------+-----------------------------------
                            Total |     10,000      100.00

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