Frequencies for first 10,000 rows of otherab variable in natl1999 dataset :

      Other |
   Abnormal |
 Conditions |
     of the |
    Newborn |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        405        4.05        4.05
          2 |      9,595       95.95      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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