Frequencies for first 10,000 rows of othercon variable in natl1994 dataset :

      Other |
 congenital |
  anomalies |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         12        0.12        0.12
          2 |      9,982       99.82       99.94
          9 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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