Frequencies for first 10,000 rows of uld_seiz variable in linkpe2009psden dataset :

   Seizures |
     During |
    Labor U |
(f_uld_seiz |
    ure rep |
      flag) |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |     10,000      100.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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