Frequencies for first 10,000 rows of othercon variable in natlterr1998 dataset :

      Other |
 congenital |
  anomalies |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         87        0.87        0.87
          2 |      9,911       99.11       99.98
          9 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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