Frequencies for first 10,000 rows of birwt4 variable in natl1996 dataset :

Birthweight |
   Recode 4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        189        1.89        1.89
          2 |        729        7.29        9.18
          3 |      9,075       90.75       99.93
          4 |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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