Frequencies for first 10,000 rows of birwt4 variable in natl1998 dataset :

Birthweight |
   Recode 4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        196        1.96        1.96
          2 |        743        7.43        9.39
          3 |      9,061       90.61      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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