Frequencies for first 10,000 rows of otherlb variable in natl1991 dataset :

      Other |
complicatio |
 n of Labor |
     and/or |
   Delivery |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,450       14.50       14.50
          2 |      8,520       85.20       99.70
          9 |         30        0.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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