Frequencies for first 10,000 rows of othercon variable in natl1989 dataset :

      Other |
 congenital |
  anomalies |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         11        0.11        0.11
          2 |      9,752       97.52       97.63
          9 |        237        2.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 Jan 2016