Frequencies for first 10,000 rows of f_uca_urogen variable in natlterr2006 dataset :

      Other |
 Urogenital |
  Anomalies |
(uca_urogen |
        ) U |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,186       51.86       51.86
          1 |      4,814       48.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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